05 June 2016

Substance & Structure

This is a long-read (~ 5000 words) polemical essay about parts and wholes; about analysis and synthesis; about substance and structure. It's about the tension that exists between modern ways of thinking about these things and traditional Indian Buddhist ways of thinking about them. About why the traditional ways of thinking about them are a philosophical and practical disaster.

In 2009 I wrote about the Vajirā Sutta which contains one of the most famous similes in all of Buddhist teaching, i.e. a being is made up of skandhas in the same way that a chariot is made up of wheels, axles, etc. We take this to imply that a being is no more than the sum of its parts. Similarly any complex phenomenon (saṃskāra) is merely the sum of the simple phenomena (dharma) that make it up.
This argument may also be familiar to us via the allegorical story of the axe (or shovel). The man in the story says that this is his favourite axe. "Of course," he adds, "I've replaced the handle several times and the head also." The clever Buddhist leaps to an Aha! at this point because man has trapped himself in a foolish error (one that we apparently make constantly), which is to consider this to be the same axe. We assume that it cannot be the same axe if all its parts have been replaced. After hearing this little parable, the maxim "everything changes" is trotted out, heads nod sagely, and it's game over for common sense. We never question the explicit reductionist assumptions, that come to us from ancient India, that complex objects are merely the sum of their parts and no more. This essay questions that assumption, and tries to show that it is wrong.

The idea that we don't exist except as the minimal sum of our parts and no more is so counter-intuitive that it makes very little headway in most people's minds. A few nihilists are attracted to the idea that we are nothing more than the sum of our parts, but I think most people find nihilism a bit off putting. Indeed the Western way of thinking leans towards the opposite conclusion, that things are considerably more than the sum of their parts with a large dose of woo. This is, for one thing, why we find the afterlife so plausible. Ironically, both of these central Buddhist doctrines require us to be greater than the sum of our parts, even though this contradicts the story of the chariot. It is yet another incoherence at the heart of Buddhist metaphysics. 


The Axe


If I replace the head and handle of an axe, is it still an axe?
It is, right?
My starting point for this essay is to ask if anyone would dispute that the axe in the story is still an axe? Or, having replaced the parts of the axe, has it become something other than an axe? I think most people would agree that the combination of an axe-handle and an axe-head together, aligned in the right way, would always make an axe. No matter how often we change the parts. Potential there is always an axe and as long as we continue to supply axe-heads and axe-handles, there always will be an axe. Not an unchanging axe, to be sure, but the axe will exist in every sense of the word as we use it in English (though not in Pali or Sanskrit, but we'll come to this). 

This point is often lost in the telling of the parable. We get out of it what we want to get out of it, which is confirmation of our existing belief in the contingency of the world. What we do not see, due to this confirmation bias, is the important point that no matter how many times we replace the parts with other suitable parts, the object is still an axe. And if the axe is still an axe, no matter how many times we replace the parts, then there is an invariance that is not accounted for by our reductive Buddhist theory. Something is not changing. But that something cannot be found by reducing the axe to its parts! In fact, the act of reducing the axe to its constituents obliterates the something and apparently allows us to claim that it never existed in the first place. So then, what were we chopping our wood with before we broke our axe?

Another view is that the axe is not simply the sum of its parts. It functions because its parts are put together in a particular way. In other words it can function as an axe only because it is structured or organised as an axe. Any appropriate materials can be used. A stone-headed axe is still an axe, because it has the same structure and is used for the same function. So any composite object, including a human being, is greater than the sum of its parts because structure gives those parts a unity and allows them to function (to be causal) in ways that are not implicit in the mere materials. Steel and wood can be structured in a variety of different ways to make objects with different functions - related tools for example (saw, chisel, hammer, adze, spear, arrow, etc). But steel and wood could be make into something entirely different. A clothes-peg for example. A desk. A picture frame. In these examples the parts also have structure. Structure can manifest at different levels. And structure at one level need not influence structure at another - having shaped a steel blade and a wooden handle, we are still free to configure them as different tools depending on our desire.

As early as 1843, John Stuart Mill was making the same point about chemistry (see Mill 1868). To use an example from one of his later contemporaries, the properties of a water molecule cannot be understood by adding together the properties of hydrogen and oxygen. In the chemical reaction that creates water from hydrogen and oxygen something new has come into being. It is not new in substance, since we know that it is composed of two hydrogen atoms and one oxygen atom. But it is new in structure and function. Water is greater than the sum of its parts. It interacts with the world in ways that a simple mixture of hydrogen and oxygen cannot, in fact water is utterly unlike a simple mixture of hydrogen and oxygen. George Henry Lewes (1875) introduced a new term for these new properties: emergent. Complex objects have emergent properties that are not inherent in their constituents, but only emerge when the parts are welded into a structured whole.

The point is that this is true also of our bodies. We replace atoms, molecules and cells as we go along, so that the elements that make up our bodies now, are different from those which made it up when we were born. Although some brain cells tend to remain throughout our lives once they appear. Similarly though the cell is the fundamental unit of living things, not all cells are identical in the way that all electrons or carbon atoms are identical. Just as identical and interchangeable atoms make up a variety of different molecules, there is no reason for evolution not to create infinite variety based on the basic structural features of the cell, e.g. brain cell, nerve cell, muscle cell, blood cell etc. The structures of lipids, proteins and nucleic-acids are important, but they don't fundamentally limit how cell might diverge (as long as it has the basic structural features of a cell).

The principle I am describing has several different names, the two most common are structure antireductionism; and emergentism. Some form of antireductionism seems to have been adopted by Aristotle, but J S Mill's explanation of it is the starting point for a more serious modern discussion of the principle. I became aware of this coincidentally after starting to read a series of blog posts on The Brains Blog by William Jaworski, who was aiming to provide an introduction to his book Structure and the Metaphysics of Mind (2016). Searching for background on his argument, I found an excellent introduction to the subject by Richard H. Jones (2013), whose work on translating the Prajñāpāramitā and Madhyamaka works I have cited in the past. Jones is a thoughtful writer who seems to write at the right level for someone like me. The book is genuinely introductory in that it doesn't seem to assume too much prior knowledge of the subject, but its also focussed and serious and takes me deeper into the subject. Jones tries to present all sides of the argument, while clearly favouring a view that might be called substance reductionist & structure antireductionist. 

Currently in terms of substance it is clear that physics accurately describes the world we live in. But structure reductionism is an abject failure in accurately describing our world. It explains nothing. On the other hand structure antireductionism has some unsettling consequences. It says that every single new level requires its own rules: water does not simply have emergent properties, but these emergent properties are real and this level of reality requires its own explanation. This might be the death knell for the great unification project that has been a characteristic of Western knowledge production since the ancient Greeks.

The usual Buddhist point of view is this: we are simply the sum of our parts (often those parts are the skandhas); and the parts that make us up are constantly changing; so we don't exist in a permanent sense. And ancient Indian Buddhists always use "exist" to mean permanently existing without alteration or any possibility of change. So if we are arguing against an ancient Indian Buddhist then this is demonstration of an existing but yet changing entity is to them an oxymoron. The statement that an axe can exist but also change is self-contradictory. This reductionist argument based on the skandhas (or dhātus or whatever), which is self-consistent, is seen as a powerful confirmation that our Buddhist views reflect reality, but it entirely leaves out the question of structure. It does not acknowledge that a person persists over time as a structure, if not as a collection of the same parts, then as a series of parts making up the same structure. Because Buddhists were committed to this reductionism, they could not acknowledge the way that structure makes complex objects greater than the sum of their parts. Most Buddhists still cannot. However, this Buddhist form of structure reductionism has all the same problems as the structure reductionism of scientists. It doesn't work.


What Arises In Dependence on Conditions?

Rightly speaking it is dharmas that arise in dependence on Conditions. And dharmas are the object of he manas, or mind-sense. It is problematic to apply this Buddhist theory to objects themselves when it really only applies to our experience of objects. In other words, what arises in dependence on conditions is precisely experience. This is made explicit in the Vajirā Sutta in the last lines of simile that are almost always left out when citing this tex:
Dukkhameva hi sambhoti, dukkhaṃ tiṭṭhati veti ca;
Nāññatra dukkhā sambhoti, nāññaṃ dukkhā nirujjhatī’’ti
For only suffering is produced; suffering persists, and ceases.
None other than suffering is produced, none other than suffering ceases.  
This sentiment is echoed in the Kaccānagotta Sutta (cited here in its Pāḷi, Sanskrit and Chinese versions):
Pāḷi: ‘Dukkhameva uppajjamānaṃ uppajjati, dukkhaṃ nirujjhamānaṃ nirujjhatī’ti
Skt.: duḥkham idam utpadyamānam utpadyate | duḥkaṃ nirudhyamānaṃ nirudhyate |
Chinese: 苦生而生,苦滅而滅。
P: “Arising is only disappointment arising. Ceasing is disappointment ceasing.”
S: Arising is this disappointment arising; ceasing is disappointment ceasing.
C: Disappointment arising, arises; disappointment ceasing, ceases.
Experience here is not characterised as duḥkha or unsatisfactory; it doesn't have unsatisfactoriness as a quality; experience is duḥkha. In this context experience is synonymous with the world (loka) of experience. In early Buddhist texts duḥkha and loka are ways of talking about the same thing, which was first noted by Sue Hamilton (2000).

The parts that a person or indeed the world is supposedly made up from, the skandhas, turn out to be more like the apparatus of experience or the experiencing factors. So Buddhists usually misapply there own most significant formula to "reality" and try to make pratītyasamutpāda an theory of what exists (ontology) or worse, a Theory of Everything (TOE) that exists. It does the job badly. The skandhas are far too flimsy to represent the world or even objects in the world, and 4 of the five are mental and thus nothing to do with the mind-independent world anyway. Given that it describes experience well and the mind-independent world badly, I give the early Buddhists the benefit of the considerable doubt and assume that it was intended to only describe experience. The parts (skandhas) are aspects of how our minds create our experiential world from sense impressions of the world. The possibility of mind-independent reality is left open and never addressed by early Buddhists, though experience really only makes sense if there is one.

In other words, pratītyasamutpāda is not a theory of what exists or how the world works, but a theory of what experience is and how it works. It says nothing about the axe per se. On the other hand this is exactly how most Buddhists in history have taken pratītyasamutpāda.


Structure and Scale

Recently I started asking myself a question about what is real. Not in an "I can't tell what's real, I'm going mad" kind of way, but in a reflective philosophical way. In particular, I've previous written about the importance of scale on how we understand the world. The rules that apply on one scale may not apply on another. There are obvious examples of this. The kinds of objects that we can perceive with our naked senses follow laws described in classic mechanics and chemistry. However at the nano-scale, these rules are not followed and another type of mechanics, quantum mechanics, are required to describe their behaviour. This was so far from being intuitive that in 200,000 years of anatomically modern humans, it is less than a century since these new rules were first described in detail. 

If we fire a rifle into the air, the bullet gradually, smoothly slows down due to friction over-coming inertia. Gravity makes the bullet describe a parabolic curve, though one that is gradually compressed as it slows down. If I shoot a mass-less photon into the air will travel in a flat curve that is determined by curvature of space, but which at the surface of the earth may appear to be a straight line. A photon does not experience drag in the atmosphere, but will keep going until it collides head on with something, at which point it will undergo an instantaneous transition to a different energy level that is a multiple of some constant (a quanta in other words).

Bullets do not behave like photons and vice versa. There is a discontinuity between the different scales so that different fundamental laws apply. This was the point of my essay Erwin Schrödinger Didn't Have a Cat (29.10.2010). What applies to a sub-atomic particle does not apply to a cat; and vice versa. The cat is a metaphor. Matter at the nanoscale is governed by probabilities, with some real limits on what we can know via Heisenberg's Uncertainty Principle. For example, the more precisely we specify the position of a particle, the less we can know about its momentum; and vice versa; and similarly with other pairs of quantities. Matter at the macro-scale, in sharp contrast is governed by cause and effect and we can very precisely specify both position and momentum for any macro object. Matter on the nano-scale is discreet and digital (quantised), matter on the macro-scale is continuous and analogue. And so on. 

This creates a problem for determinists. Determinism is a product of structure reductionism. In the structure reductionist view, everything can be explained by breaking the world down into its components and describing how those components behave. At present, the best explanation seems to be that the world is fundamentally made of a number of interacting quantum fields (not that I understand quantum field theory!). The interactions of these fields is what leads us to see particles and forces when we look at the universe at the appropriate scale. Quantum mechanics describe the behaviour of individual particles that are the manifestations of quantum fields interacting, but quantum mechanics is not deterministic, it is probabilistic. The matter that we can perceive with our senses does not, despite what certain "spiritual types would have us believe", follow the same rules as the particle does. The probabilistic quantum world does not determine the macro world. This means for example, that deterministic arguments against freewill fall short if they are rooted in structure reductionism. Within introducing any woo factor, determinism is simply not a convincing explanation of higher levels of structure and organisation. Determinism does not predict emergent properties. 

Another major discontinuity occurs at larger scales when classical mechanics also fails to provide a good description of matter and we must shift to using relativistic descriptions. And finally at the scale of the whole universe some unknown force is causing the universe to expand at an increasing rate. When we look at galaxies they are accelerating away from each other and we do not understand why this is, though we refer to the phenomenon as "dark energy". And the thing about these distinctions of scale is that they have almost no effect at different scales. Clever chemists can make some large molecules behave as particles, under special conditions, which is no doubt interesting as it blurs the boundaries between levels. But, at the macro-scale we typically interact with at least sextillions (1021) of molecules at a time and we never see probabilistic behaviour. To our naked senses there is no observer effect, no tunnelling, no entanglement, no (self)interference, and so on. Similarly when we look at the world with our naked senses we do not see curved spacetime or have any reason to see space and time as related. Space looks flat. Everyone thought it was flat until 1919, when English scientist Arthur Eddington disproved this proposition by observing the bending of the path of photons passing close to the sun. This could only be explained by the curvature of spacetime itself (the first of many successful tests of the accuracy of Einstein's General Relativity). 

Another way I have developed for looking at the problem is that lower level physical laws are more general; higher level laws are more specific. So there are physical laws that govern atoms, that describe and circumscribe the nature of chemistry, e.g. thermodynamics, electromagnetism, etc. Such laws describe the possibilities at the next level of complexity, but they do not specify which of the possibilities will manifest, or how that level will appear to us. Of all the possible molecules, only some occur naturally in the set of conditions set by the conditions on the earth, one of the main contributions comes from the higher level level of interconnected ecosystems of organisms (or Gaia, if you like). Though it is a debatable proposition as to whether higher level structures are capable of downwards causation. Similarly the laws that govern the emergent properties of cells describe and circumscribe the nature of evolution, but they do not specify which species will evolve at any given time. Evolution is governed by higher level laws like natural selection. Perfect knowledge of the first cells would not give us the ability to predict what life on earth would look like at any point in time. It would only allow us general knowledge about life now. For specific knowledge we have to go to higher levels. Higher levels must be studied in their own right and though they are circumscribed by lower level laws, the emergent properties of higher levels are not determined by lower level laws.

Another potential confusion for Buddhists is that the act of analysis, the success of analysis as a method, does not validate reductionism. The success of analysing experience into skandhas does not validate the doctrine that there are only skandhas and nothing else. Antireductionists generally acknowledge the usefulness of analysis. In understanding a cell it is helpful to know how and of what the structure is composed. Just as in understanding water it is useful to know that its parts are two hydrogen atoms and one oxygen atoms; or that an axe is made from head and handle. Reductionism requires us to accept that the whole is only the parts, and that all levels collapse to the lowest one we can imagine. It is clear that this is a bar to understanding the behaviour of wholes. It is one thing to say, for example that the brain is made of atoms, it is another to say that a full knowledge of quantum mechanics is sufficient to understanding human behaviour. The further apart the levels are, the less likely this proposition seems. Emergent properties, and emergent laws, manifest at every level of complexity: atoms don't behave like quarks, molecules don't behave like atoms, cells do not behave like molecules, organs do not behave like cells, organisms do not behave like organs, organisms with brains do not behave like organisms without brains. At no point does perfect knowledge of a lower level ever lead to a full understanding of a higher level (or vice versa). 


Conclusion

I'm often appalled by how simplistic Buddhist arguments about philosophy are (and I am far from being the world's most sophisticated philosopher!). All too often I see all scientists written off as "Materialists" or "Physicalists" for example, and all of their knowledge judged as irrelevant to the Buddhist project. I've complained about this before (see Physicalism, Materialism, and Scientism. 8 Aug 2014). No consideration is given to issues of how individual scientists might approach substance, structure, theory, or method. When I read someone like founder of the Triratna Order, Sangharakshita, complaining about scientists insisting on a "mechanistic" view of the world, I cannot help but be depressed that his knowledge of science seems to stop at the end of 19th Century. Similarly with many other prominent contributors. 

Yes, there are some scientists who are structure reductionists and as such make ridiculous claims about the success of mechanistic or deterministic views, or dismiss freewill, and so on. To be fair very few physicists are taught philosophy, so they don't really know how to think. On top of this prominent scientists like Stephen Hawking dismiss philosophy as irrelevant, while indulging in hedgerow philosophy of the worst kind. That said, more characteristic of our leading scientists is a more nuanced view of what they do and what the universe is like. For example, the success of quantum physics has undermined all claims to a mechanistic universe and this is generally acknowledged. Einstein infamously complained that he found the idea of a probabilistic universe objectionable. But Einstein was wrong, the quantum level is probabilistic, though of course this does not mean that the macro-world is probabilistic. We know that it isn't. Silly problems, like the singularity at the beginning of the universe are now widely accepted by scientists as problematic - as Sean Carroll recently tweeted (with added emphasis), 
The Big Bang “model” (hot expanding universe) is true; the BB “event” (early singularity) is just conjecture." 
(The Big Bang singularity isn't even sensible conjecture. There are no singularities in quantum mechanics. Could be a first moment of time.) 
All too much of what passes for intellectual discourse in Buddhism is bad philosophy and bad science. I've written about the various problems I've found in closely examining Buddhist doctrines. I find very few Buddhists (or Buddhist Studies scholars for that matter) are at all interested in such problems. And I've also written quite a lot on why people continue to find religious ideas intuitive and even compelling. So it's not surprise to me that I meet resistance when I talk about problems in Buddhist doctrine, but it can still be quite frustrating.

This particular problem is one that ought to really shake Buddhists. Buddhism is both substance and structure reductionist. The substance reductionism, which distorts a model which was originally a description of experience into an ontology, is incoherent. It is possibly the worst description of the universe that has ever been seriously considered. It is one thing to reduce experience to dharmas or cittas, but to try to reduce the whole world, everything, to dharmas? That leaves us confused. Dharmas are not good candidates for the ultimate substance of the world because they are irreducibly subjective. But worse, where they do make predictions about the world, they are demonstrably wrong. If we restrict this theory to the epistemic domain, or what we can know about the world, then some of the claims made stand up. But Buddhists insist that it applies to the ontic domain, to what is. Subjectivity probably does affect how the world looks to us, does not determine how the world is. But in practice what we find is that Buddhist theories of what the world is made of are just wrong. Most Buddhists hold a dualist or vitalist view in which consciousness is a distinct substance. This view is no longer tenable. And it turns out that the world is made of particles and/or energy. Buddhist is just completely wrong about the substance of the world. Buddhist substance reductionism might have worked as psychology, but as ontology it is laughable.

The structure reductionism of Buddhists causes most of us to believe that complex objects do not have emergent properties, but can be considered as admixtures of the properties of their constituent parts. In this view, a being is no more than the the combined properties skandhas. Since, emergent properties are so much a part of modern discourse I imagine that many Buddhists would be concerned to know that their worldview denies the very possibility of emergent properties. Especially those who are enthused by general systems theory (often via Joanna Macy's book Mutual Causality in Buddhism and General Systems Theory: The Dharma of Living Systems). Perhaps the late invention of interdependence solves the problems caused by denying emergent properties (without which general systems theory doesn't work), but I don't see how this helps. Mutual causality still reduces all structures to the simple additive properties of the constituents, so it does not allow for emergence of new causal entities. Ironically, various Abhidharmas did invent different kinds of causality to try to solve the problem of maintaining continuity between action and consequence, but as we've seen this explanation fails (see The Logic of Karma. 16 Jan 2015). And in any case they still reduce all forms of causality to one.

But the really great disaster of Buddhist philosophy is the insistence on equating existence with permanence. This is an error of such great proportions and such catastrophic consequences that it is hard to over state it or forgive it. That most people who talk and write abut Buddhism never address this foolish criteria or adjust their language to account for it is another indictment of out intellectual culture. If we only remove this unnecessary restriction then, at the very least, we can dispense with the tortures of studying Nāgārjuna and Madhyamaka, which are entirely framed within this unworkable ontology. And the world would be a better place for it.

What I wonder is how Buddhists ever came to be so triumphant about their philosophy. How does a group with such a grossly defective view of the world end up trumpeting their superiority over all comers? It's a joke right? I've said this before, but the Emperor has no clothes! And the scholars who are supposed to be objective about Buddhism are all so in love with it that they don't see it either. Since more and more monastics, with explicit commitments to medieval religious worldviews, are infiltrating academia, this situation is only going to get worse. Worryingly, the same scholars are often part of a movement that seeks to impose the teaching of Indian "philosophy" on university philosophy departments!

Something is rotten in the state of Buddhist philosophy. There's just no mileage in the kind of reductionism that is axiomatic in Buddhism. At the very least we need to think in terms of structure antireductionism and emergent properties, and this involves at the least rejecting traditional reduction to the skandhas. It would also help to clarify the way in which substances reduce, not to subjective mental constituents, but to objective quantum fields. Do I even need to repeat that I think that Buddhist claims to understand the true nature of reality are laughable?

Of course the remaining uncertainty over how to think about consciousness is going to make it difficult to really deal a death blow to traditional Buddhism - it will cling to life by claiming to have understood and explained consciousness (though it doesn't). Clearly the brain itself is subject to substance reductionism, it's made of matter. Substance reduction is completely useless for producing plausible theories of consciousness. But how the structures of the brain produce a first person perspective is not understood. If it is to be understood, it seems that a structure antireductionist approach is the most promising. And since Buddhists are structure reductionists, it seems unlikely that they will have much to contribute.

Buddhists need to take stock of what they believe. We need to stop papering over the cracks and being flattered by the attention that we get from outsiders. We need to hold our hands up and admit that, as sophisticated our intellectual defences are, we don't really understand much at all. Where we think we do understand, we often seem to be deeply confused and flailing.


~~oOo~~


Bibliography

Hamilton, Sue. (2000) Early Buddhism: A New Approach. London: Routledge.

Jaworski, William. (2016). Structure and the Metaphysics of Mind: How Hylomorphism Solves the Mind-Body Problem. Oxford University Press.

Jones, Richard H. (2013). Analysis & the Fullness of Reality: An Introduction to Reductionism & Emergence. Jackson Square Books.

Lewes, George Henry. (1875). Problems of Life and Mind. Vol.2. London: Kegan Paul, Trench, Turber. https://archive.org/details/problemsoflifemi01leweiala

Mill, John Stuart. (1868). A system of logic, ratiocinative and inductive; being a connected view of the principles of evidence and the methods of scientific investigation. 2 Vols., 7th ed. London: Longman, Green, Reader and Dyer. [First published 1843.] https://archive.org/stream/asystemoflogic01milluoft

20 May 2016

The Problem of Relativism

"Reality at its deepest level could be something utterly different than we have ever imagined, but we still have a good handle on how it behaves in front of our noses." 
- Sean Carroll, Fear of Knowing.

In previous essays I have tried to address some of the common complaints about scientific knowledge. I've looked at the common pejoratives wheeled out by apologists for traditional Buddhism, i.e. Physicalism, Materialism, and Scientism (08 August 2014); I've tried to show that Schopenhauer could not have "refuted Materialism" before he died in 1860, as one of my Order colleagues claimed (Vitalism: The Philosophy That Would Not Die. 23 May 2014); and I've looked at The Limitations of Transcendental Idealism (1 Apr 2016).

These are among the most frequently cited reasons that, for example, we cannot rule out an afterlife, a just-world, or other metaphysical speculations that are foundational to traditional Buddhism (and of course to other religions). There is a powerful, coherent argument can be put forward which, even admitting massive limitations to our knowledge about the universe, none-the-less refutes any possible afterlife (There is No Life After Death, Sorry. 23 Jan 2015) and by extension any kind of supernatural entities or forces. However, many people still refuse to admit the salience of such arguments to their worldview. In other words it's not that they disagree with the argument, but that they believe the argument is irrelevant. This is entirely in line with the predictions of evolutionary approaches to studying religion (Facts and Feelings. 25 May 2012). This distinction between the truth of a proposition and its salience in decision-making is a dynamic that has informed my thinking and writing for some time now. 

A proposition can be more or less accurate and precise, but this may have no correlation to the salience that any individual or group gives it in their worldview.  Since the factual accuracy of mainstream science is now undeniable, critics of science and anti-intellectuals usually attack arguments against the existence of an afterlife or a just-world at the level of salience. For example, they may not even feel compelled to engage with the content of an argument in detail because "it is Materialist". Repeating this mantra resolves the matter for them. Dualists hold it axiomatic that studying matter tells us nothing about consciousness, because consciousness is a different kind of stuff. In this view our knowledge of brain activity is all very interesting, but not salient to the understanding of consciousness under any circumstances, no matter how many correlations we identify. All empirical knowledge of the brain is simply ruled out of bounds in the discussion of consciousness, because in their worldview conciousness is not accessible empiricism. If the Dualist also accepts rebirth as an article of faith, which many Buddhist Dualists do, then this anti-enlightenment argument serves the purpose of defending Buddhist metaphysical speculation about the afterlife. 

I've tried to field these objections by attempting understanding what it is like to hold a Dualist view and the reasons that such propositions remain valid to some people and how they affect the salience of Naturalist arguments (see e.g. Why Are Karma and Rebirth (Still) Plausible (for Many People)? 14 Aug 2015). But there is one pernicious criticism of science that I've not yet tackled. This is Relativism. Relativism is a view which states that a quality like "truth" is always relative to a given frame of assessment; and that there is no framework independent vantage point from which to make assessments claims to truth. (Cf. Stanford Encyclopedia of Philosophy).

No personally I find the legacy arguments about "truth" unhelpful. If I make an assertion about the world then it can be an accurate description or prediction; it can be precise; and it may have inherent error. All our observations about the world have these three properties, i.e. accuracy, precision, and error, and thus I do not try to invoke the true/false dichotomy. I'll deal with these qualities in more detail below.

Relativism got a massive boost from European philosophy in the 20th Century. Post-Modernists argued that the meaning of a text is not fixed but created by the reader. In effect the author may think they are writing one thing and the reader may entire disagree and think that the text means something else. Anyone trying to engage in rational debate on the internet will know what I mean. One finds that that people read the most bizarre assumptions into and take the most outrageous inferences from what one writes. But the post-modernists also argued for the broadest possible definition of a text and application of this principle. This lead to a radical kind of Relativism in which it is held that no one could say anything definite about anything because anything could be considered a text and deconstructed. This inane argument is still a popular stance amongst certain university graduates.

Since Western intellectuals rejected Positivism, it is accepted that scientific theories cannot be proven to be true. And this is something I'm been trying to make more explicit in my spiel since I was bizarrely accused of being a Positivist by some philosophers. Scientific theories can never be true, in the strictest philosophical definition of metaphysical certainty, but they may be extraordinarily accurate and precise within the margins of error inherent in measurement. Take the example of the Higgs Boson. The media often portray this in terms of CERN and the Large Hadron Collider (LHC) project having proved the existence of the Higgs Boson. But this is not quite what happened. The standard theory predicted that a particle of a given energy would provide the mechanism whereby other particles responsible for the character of the weak nuclear force would exhibit the quality of mass (thereby explaining the extremely short range of the force). The mathematical models predicted that the particle responsible would have an energy in the range 110-140 GeV (a rather imprecise prediction). Once we had equipment capable of looking for particles in that energy range, in the shape of the LHC, we looked and found a particle. To date we know nothing more about the particle than that it is a boson, or force carrying particle, that has an energy of ca. 126 GeV*. It might be the Higgs Boson, it might not. It's possible that tomorrow someone will publish a theory which provides a better explanation of a boson with an energy of ~126 GeV, though the discovery does have to be taken alongside all the other predictions and tests of the theory with which it fits quite well.
* The two LHC detectors discovered a previously unknown boson with mass 125.3 ± 0.6 GeV and 126.0 ± 0.6 GeV respectively. It must be a boson because of how it decayed.

A sharp distinction between truth and falsehood is only relevant in the rarefied and abstract world of philosophy or in courts of law. Scientists deal in making predictions and measuring the accuracy of predictions to the best level of precision they are able, with the least amount of error. A theory which is consistently accurate is useful. My argument for why such theories cannot be wholly divorced from reality were made in The Limitations of Transcendental Idealism (1 Apr 2016). If reality were utterly different from how we conceive of it, we could not conceive of it. But the fact is that by careful measurement and comparing of notes, and through clever interpretation, we do know what reality is like at several different levels and are making progress on both the fundamental substance of the universe and the overall structure of it. In between, we now fully understand reality on the energy, mass and length scales of everyday life. The complexity of the weather makes it difficult to predict far in the future, but we know all of the forces and particles involved in creating weather. Reality is based on matter and energy and no new particles or forces are required to explain anything we see with our naked senses. Indeed there is no room for new particles or forces in our understanding of the world at this level.


Properties of Measurements

Apart from pointing out the irrational basis for it, one simple refutation of Relativism is that the laws of physics still apply even if we do not believe in them. It doesn't matter how you conceive of gravity or interpret it; it does not matter which culture you are from or what you studied at university: a 1000 kg weight dropped from 100 m will crush you like a bug. So even Relativists look both ways when crossing the road, apparently their interpretative framework allows for the working of physical laws even when their philosophy denies that this should be so.

All measurements have three properties: accuracy, precision, and margin of error. Let's imagine that I wish to measure an object that is exactly 1010 mm long. I have a measuring tape with increments of 1 mm. Thus the precision of the measurement is millimetres. The inherent error in the measuring tape (assuming it is accurately calibrated) is usually taken to be half the smallest increment, in this case ± 0.5 mm. Often the first step in taking a measurement is calibrating your instrument - this is a regular procedure in analytical labs for example. Accuracy is how close I get to real measurement. If the tape says 950 mm then that is not very accurate. If it says exactly 1010 mm that is very accurate. But in science we would still give this as 1010 ± 0.5 mm because our instrument has inherent error. For all we know it might have inherent imprecision as well. So we need to repeat the measurement using a different measuring tape or a completely different method as well and compare the results. One measurement is never sufficient. All science is like this.

Sometimes we can sacrifice precision because there is a large inherent error. If we are driving a car along a road is 100 km long, we don't gain anything by measuring our distance travelled in mm, because a car is several meters long in any case. A level of precision of tens of meters is fine for this purpose (and car odometers often have 100 metres as their smallest unit). It can get more complicated. Within a particular inertial frame, such as measuring the length of a road on earth, there are no relativistic effects so we don't need to take into account the relative velocities of the instrument and the object. We can just use classical mechanics to describe the situation because the lack of precision is insignificant compared to the margin of error. If the object I wish to measure is an alien spaceship passing the earth at 10% of the speed of light, then I would have to take into relativistic effects and change how I was interpreting the measurement, because objects appear longer when there is a large relative velocity between object and observer.

The kind of predictions that science makes about reality are really not dependent on interpretative frameworks to the extent that Relativists make out. For example, Einstein's equations predicted that the massless photon would follow a curved path near a massive object. As a massless particle the photon cannot be directly affected by gravity. Einstein proposed that rather than thinking about masses exerting a force on each other, that we we should think of mass bending spacetime. Since photons travel through spacetime, they ought to follow a path determined by the topology of spacetime, the curvature of which would be especially noticeable near a large massive object (like a planet or the sun). This prediction was tested quite early by watching stars near the sun during a total solar eclipse. The path of light from these stars came close enough to the sun for us to be able to measure the curvature caused by the sun's mass, with sufficient precision and margin of error, to show that Einstein's prediction was extremely accurate. Subsequent tests over a century have all demonstrated that Einstein's description of spacetime is accurate to the limits of precision and error available to us. None of this is dependent on where we grew up, or what language we spoke. Einstein wrote his famous papers on Relativity in German.

A photon will follow a curved path near a massive object whatever you believe to be true about the universe. Of course it is only in certain interpretative frameworks that one would even look for evidence of this prediction or count it as salient. In many ways this theory about photons moving in spacetime is not salient to daily life for the vast majority of people. The curvature of spacetime near the earth is so slight that for the purposes of daily life, light travels in straight-lines and we cannot see individual photons in any case. Beyond the physical facts, the curvature of spacetime may not be salient to the Relativist, because in their case being theory-laden prevents them from correctly assessing the salience of any observation. But such observations, repeated, argued about, and now widely agreed upon, are salient when we are considering how the universe works. If we conjecture, for example, that "the universe is moral", then accurate theories of how the universe works in practice are salient. If we conjecture that there is life after death and speculate on how information is conserved from life to life, then again, physics and chemistry are salient.

However, a major problem for Buddhists is that our theories on these subjects don't even stand on their own terms (e.g. The Logic of Karma 16 Jan 2015), let alone when we introduce the more demanding criteria of not violating robust physical laws. The internal logic of karma and rebirth are flawed even on the terms of Buddhists themselves. This is not an original observation of mine, although I did come to this conclusion independently. Nāgārjuna made this observation about mainstream theories of karma and rebirth in the 2nd Century CE. According to Nāgārjuna such propositions cannot possibly be paramārthasatya or ultimate truth. Ultimately there cannot be karma and rebirth, because both violate more fundamental Buddhist axioms about the world. To the best of my knowledge there is no effective counter to this argument from either Theravāda or other Mahāyāna Buddhist sects. Pureland Buddhists have been avoiding the karma problem for at least 2000 years by allowing Amitābha to intervene to save us from our karma. Nor did Vasubandhu and the Yogācārins find the solutions available to them in the 4th Century CE any better, leading them to introduce major innovations into the theory, specifically the ālayavijñāna an ad hoc, block-box solution that provides continuity without being effected by phenomena. The ālayavijñāna this looks every bit like an ātman or like the puruṣa of Sāmkhyadarśana.

But let us return to the present day and the arguments against trendy modern Relativism.


The Solipsistic Fallacy

One of the key Relativist arguments is to point out that observations are always "theory laden", i.e. we unconsciously interpret what we see before we ever report it. While this is accurate to some extent, it also fallaciously insists that everyone is a solipsist who never compares their observations with other people. This fallacy is so common that it needs a name. We can call it the solipsistic fallacy. Because of the solipsistic fallacy, Relativists effectively argue that we cannot identify the problems associated with interpretation by the simple expedient critically comparing notes. In the most extreme version of Relativism each individual is free to interpret any information from their own point of view. In this view, not only is there no truth, but there is no accuracy either, since the accuracy of any theory supposedly depends on the interpretative framework of the observer. This extreme version of Relativism is clearly nonsense, since it amounts to a form of Idealism in which we have no access to other minds and comparing notes wouldn't help even if we could do it.

The solipsistic fallacy genuinely is a fallacy precisely because we can compare notes. Any one with a small telescope can look at Jupiter and confirm Galileo's 1610 observations of the motions of its major satellites. By comparing notes we can identify which aspects of perception are down to the individual and which are not. If we can identify what comes from our interpretations, we can account for that and eliminate it from our understanding of the world around us. We can also design apparatus to respond to the world in ways that we cannot, such a X-ray or gravity-wave detectors. And we can use different apparatus to eliminate the bias due to our designs, which is why the LHC has two main detectors and why the results confirmed by both types of detector are so compelling.

So yes, our individual observations are theory laden. Observation is always accompanied by interpretation to some extent. If two people observe something they may not interpret it the same way and if they compare notes a discussion ensues, something that is not possible according to the solipsistic fallacy. That discussion is on-going and involves everyone on the planet, including millions of scientists who receive training in making and interpretation of observations. Some of the resulting knowledge is so well established that spending time doubting it is irrational and unproductive.


Interpretative Frameworks & Incompleteness.

Relativism is still attractive to anti-Enlightenment thinkers because it allows them to deny the salience of empirical knowledge and avoid the conclusions of such knowledge, even when it is completely irrational to deny the accuracy of empirical theories. It generally works at a tribal level in academia or is projected onto cultures. So, humanities scholars who cannot rationally deny the accuracy of physical laws, will deny their salience because they don't accept the worldview (or what they call "the interpretative framework") of scientists. Or they might argue that the worldview of the tribes of the New Guinea highlands is an equally valid interpretation of the world.

For Buddhists the argument usually turns to the validity of metaphysical speculations regarding the myths of the just-world (karma) and the afterlife (rebirth). If one rejects Materialism and all that goes with it on the basis of a belief in these myths, then scientific knowledge is automatically non-salient to the discussion of the validity of the myths. Traditionalist Buddhists use this manoeuvre to argue that any argument against their view based on physical reality is axiomatically invalid; in doing so they either explicitly or implicitly invoke a non-physical reality which can paradoxically interact with the physical reality with real, but at the same time undetectable consequences. "Beings" are able to move between these two realities because in essence we are non-physical. Note that not all reductionism aims at physical monism consistent with science. This is one reason arguing with religieux is so unsatisfying. Nor can one apply the method of asking for evidence, since the very method of empiricism is aimed at physical reality and can deemed outside the sphere of salience for non-physical reality.

Buddhist arguing for their myths cite the salience of propositions such as long tradition ("no Buddhist has ever disputed the idea of karma"), interpretations of scripture ("the Buddha believed in rebirth"), common sense, ("it makes sense to me that death is not the end of life") and personal experience ("my meditation experiences lead me to conclude that death is not the end"). The comments in parentheses are paraphrases of actual arguments Buddhists have offered to me in response to my questioning of the Buddhist tradition. Over the last couple of years I've dealt with many of these objections at least in passing. These are extremely weak arguments for very strong metaphysical conclusions. 

The fact is that scientists do not always share interpretative frameworks and frequently point out deficiencies in each other's methods where they have allowed bias to impinge. Where methods are acceptable, scientists also argue about how best to interpret observations. If they are well enough informed to know this, however, the Relativist may employ another manoeuvre to turn the tables. These very disagreements amongst scientists, and the fact that scientific paradigms change from time to time, are cited by Relativists as evidence that science is contingent on interpretative frameworks. The strength of such disagreements is often underplayed at the level of popular science and this bolsters the Relativist argument because they see the exposing of disagreement as undercutting the authority of science. This is a superficial argument.

I have often cited the article by Dan Sperber and Hugo Mercier in which they show that reasoning does not come into play until there is an argument. Thus argument is actually essential to the progress of knowledge. It does mean that at the bleeding edge of knowledge production there is more uncertainty. But as time goes on the arguments and critiques shakedown the theories and those that do not stand up to scrutiny fall away or are modified. As Sean Carroll has recently said,
"... emphasizing the tentative, always-subject-to-revision nature of science can be taken too far. Science has taught us some things, after all. The computer on which you're reading this really is made of atoms; future discoveries aren't going to reveal that the very idea of atoms was just some kind of mistake." - Fear of Knowing.
Today's scientific theories are more accurate and precise than yesterday's. Certainly science is not complete or entirely without disagreement and even controversy. Not by any stretch of the imagination. But we are ahead of where we were. The physics and chemistry of the level of every day life was completely understood.

However it is true that different culture view the world differently, which brings us to the subject of cultural relativity. 


Cultural Relativity

Let's stipulate that there is some culture which is thousands of years old, say a tribe of Elbonian hunter-gatherers who have never had any contact with a Westernised culture because they live in a remote place. At night, sitting around their camp fires, they look up at the stars and see what they take to be the surface of a curved dome, studded with twinkling lights. They know that there are supernatural beings participating in their daily life. A recent survey suggests that 100% of hunter-gathers are animists (Peoples et al. 2016) to whom this kind of conclusion is entirely intuitive. To the Elbonians the lights in the dome above are obviously supernatural beings sitting around their camp-fires in the sky. They don't doubt this and have believed it beyond living memory. It has been many hundreds of generations since any Elbonian questioned this "knowledge".

Relativists argue that this conjecture about the stars, which the Elbonians make, stands on an equal footing with the conjecture that the stars are far off suns like our own, great masses of gas that compress so much under gravity that the centre starts to undergo fusion and thus radiates vast amounts of energy. But the Relativists are simply wrong. The Elbonian theory of the stars makes inaccurate predictions and doesn't explain the observable phenomena. Admittedly the inaccuracy doesn't register at the levels of precisions and error that the Elbonians themselves can muster just by looking up at the sky, but the lack of available precision and the huge error involved do not render the theory accurate. These factors just mean that the inaccuracy is not salient for the Elbonians. 

We may grant that the knowledge of, say, the healing properties of local herbs accumulated by the Elbonians is quite useful. But without double-blind trials and careful elimination of the placebo effect we cannot say for sure that any particular herb is consistently associated with any effect. Even quite well educated and otherwise rational people believe in homeopathy, despite the fact that rigorous tests suggest that any efficacy attributed to homeopathy is down to the placebo effect. The elaborate process of identifying the appropriate remedy is in fact a ritual designed to set the scene for activating the placebo effect. Again the Relativist position is unhelpful because it denies that believing in homeopathy is a poor decision if there is a more accurate alternative explanation of disease and medicine. Testing shows that homeopathy gives results no better than placebo and the theory it is based on make inaccurate and imprecise predictions. All beliefs are not equal.

For example, when I went to India the first time one of our group took a homeopathic malaria remedy instead of the medicine recommended by and freely provided by the UK's National Heath Service. My colleague sincerely believed that had there been malaria-bearing mosquitoes he would be protected. It was too cold for mosquitoes most of the time. This was fortunate because his homeopathic remedy would not have protected him from the malaria parasite and serious, life-threatening illness. In this example we see that belief is definitely not neutral. What we believe about the world is important and may have life and death consequences. Relativists would have us believe that homeopathy deserves a place alongside modern medicine because people like my colleague (and the current Secretary for the Department of Health in the UK Government) choose to ignore all the evidence and sincerely believe in it. Science is not a matter of belief. It's a matter of degrees of accuracy. No matter how sincerely we believe in homeopathy it is an inaccurate theory in the sense that it does nothing to cure or prevent disease other than activating the placebo effect. And better alternatives are available in many cases. The theory of homeopathy prevents advocates from making this distinction. 

While we are on this subject, Relativists also like to use a very broad definition of the word "science" to include any accumulated knowledge. We can also say with some confidence that the Elbonian knowledge about herbs, though meticulously and carefully preserved, is not scientific knowledge. In cataloguing and using herbs the Elbonians are not doing science. Science involves more than just taxonomy or systematic use. A scientific theory tries to explain the efficacy of the herb and in so doing to contribute to a general understanding of the world. Such a theory must accord with existing theories about the world and make predictions that can be tested for accuracy.

Take the real world example of willow bark. If you have a toothache, chewing willow bark may well reduce the pain because it contains a precursor to aspirin (i.e. salicylic acid), a substance with proven analgesic effects. Simply knowing that chewing willow bark reduces pain and using it for that purpose is not an example of science. The science begins when we reflect on all the systematic knowledge that we have about the world and conjecture that a component of the willow bark interacts with our body's complex systems for registering pain; we set out to separate out the components and identify the active one; and then predict that related compounds will have a similar effect. We then synthesis those related compounds and test their analgesic properties and propose or refine a molecular theory of pain and analgesia. The theory has to be nested in with our other theories, with physics, chemistry, biochemistry, physiology, etc. If we create an ad hoc theory that is in conflict with other parts of the body of knowledge then this conflict must be resolved in one of two ways: either the ad hoc theory falls, or the mainstream does. It is almost always ad hoc theories that fall, but one or the other must happen. 

There are thousands of cultures around the world. Many of them have their own unique views about the stars, the healing properties of herbs, and the possibility of life after death. Relativists hold that each system of knowledge is valid on its own terms and that there is no external standard against which we can hold any system of knowledge to be better or worse. If we claim that reality is that standard, and science is the sum of our most accurate inferences about that reality, they may point out that this is simply our interpretative framework and our imperialist and probably racist mindset. This can be a difficult area because of our long European history of imperialism and racism. On the other hand science is truly international and transcends cultural boundaries. People of all cultures participate in the scientific project and are united by a commitment to application of the principles of scientific enquiry. 

There is an external standard by which we can judge claims to knowledge about the world. It is the mind-independent reality that we experience through our senses. We can accurately infer a great deal about this mind-independent reality by using the empirical methods I have already outlined. The case of the Elbonians shows that looking at the world through an interpretative framework can blind us to the nature of this reality. When we believe we know the answers, we don't ask questions. The ability to step outside our own worldview is really quite rare. But being blinded is not inevitable, one of the main reasons for this is that we can compare notes we people who have different interpretative frameworks and see whose theory makes the more accurate predictions. In this way we have come to know quite a lot about how the world is constructed and what it is constructed from at different levels.

On the other hand just because someone is wrong about God or the afterlife does not give us licence to feel or act superior towards them. Such views are widely held precisely because they are intuitive. And this seems to be because of the way our cognitive functions evolved. Hating someone who disagrees with us about metaphysics is about as rational as hating animals that have don't have opposable thumbs, or that do have wings. Just as in the concept of freedom of speech we defend the right of someone to say something we disagree with, in cultural terms there is no justification for looking down on cultures that have a different interpretative frame from us. We can even value another culture that we disagree with. I think many of us who started our education about Buddhism by learning about traditional Buddhism retain a feeling of respect for the original teachers of the traditions, even when we conclude that they got some things wrong. That I currently find karma and rebirth implausible does not diminish my feelings of gratitude and respect for my teachers for introducing me to the ideas, attitudes, symbols and practices of Buddhism, nor for the early Buddhists who words I read and study. As modern convert Buddhists we can, at least in theory, pay our respects to our cultural heritage and to our adopted religion. 


Conclusions

Physical Relativism is a false view. There is an external physical standard, though understanding it requires us to question our existing worldview and it can take some sophisticated technology to investigate it thoroughly. Our current state of knowledge is still partial and what we know is subject to the limitations of the precision and levels of error to which we can measure the properties of the world. But we know the macro-scale world very well. Sean Carroll has plausibly argued that "the laws of physics underlying everyday life are completely known." Cultural Relativism has serious limitations and when it conflicts with science as a modernist I side with science precisely because of this external reality. The collection of Buddhist traditions on their own terms are a remarkable and usually admirable product of pre-modern thinking with a veneer of modernism. I want to see a genuine synthesis of Buddhism and modernism. Taken to its logical conclusion, this synthesis will no doubt leave little of the traditional intact, but this will not be the first time this has happened in Buddhism. 

Moral Relativism is a much more difficult proposition because no one has yet identified any moral reality. But my argument here is not with moral Relativism, it is with the physical and cultural kinds. I think these arguments are best kept apart.

The accuracy with which one can measure one's predictions creates a divide between different groups. Philosophers seldom bother to look through a telescope or a microscope, let alone any more sophisticated apparatus. So their worldview is more constrained and their arguments less conclusive than they might be. They misunderstand the significance of the measurements being made by scientists. Similarly, scientists who are not trained to think about the implications of their measurements make mistakes like concluding that reductionism applies to both substance and structure when constructing explanations of the universe. Even if the accuracy of the measurement is stipulated there is still the problem of how belief alters the shape of our worldview by changing how we assign salience to them. An accurate measurement might be judged to have little salience because it conflicts with a cherished belief.

Indeed this can happen in science too. Max Planck once quipped that science proceeds one funeral at a time. There is now some evidence to suggest that this quip is an accurate prediction (Azoulay et al. 2015). Charismatic senior researchers do tend to stifle innovation and dissent in a field. The effect is like a large canopy tree in a forest, suppressing saplings. But then the researcher dies, and just as in the forest there is a rapid rise of saplings that have survived in their shadow (though not among those closest to the researcher). The point is that, yes, science is to some extent a hostage to human foibles, but in the long run the methods and institutions of science overcome these limitations. The same cannot be said of religious methods and institutions, which remain in thrall to cognitive bias and logical fallacy.

~~oOo~~


Bibliography

Azoulay, P., Fons-Rosen, C., and Graff Zivin, J. S. (2015) Does Science Advance One Funeral at a Time? NBER Working Paper No. 21788, December, 2015. http://www.econ.upf.edu/docs/papers/downloads/1498.pdf

Baghramian, M. and Carter, J. A. (2015). Relativism. Stanford Encyclopedia of Philosophyhttp://plato.stanford.edu/entries/relativism/

Peoples, H. C., Duda, P. F. and Marlowe, W. (2016) Hunter-Gatherers and the Origins of Religion. Human Nature. 1-22. First online: 06 May 2016. DOI: 10.1007/s12110-016-9260-0.
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