The limits of philosophy

Or should I say – “The trouble with philosophy?”

Whatever. The title certainly makes a change from those like “The Limits of science.” How many times have I seen such titles on articles written by religious apologists, philosophers of religion, or even straight non-religious philosophers. These articles usually annoy me because they often set up a straw man – a claim that science has no limits – which no scientists is making.

So it’s nice to turn the tables for a change.

Monty Python’s Football – Philosophers often play for different teams

I often get criticised by philosophers, theologians, philosophers of religion and students of philosophy for making philosophical mistakes – or so they claim. I’ve been told that I should not write about the science of morality if I haven’t read and studied a long list of ancient, and not so ancient, philosophers. Commonly I am admonished for trying to determine an “ought from an is” – a violation of “Humes Law.” And I have been told that scientists should leave questions like origins of life and the universe, or the question of existence of supernatural beings, to philosophers. Such questions, they tell me, are outside the limits of science.

Oh yes, about now I also get accused of “scientism!”

Very often my reply to such criticisms is that there is no such thing as an accepted unified philosophical dogma. That the claims thrown at me come not from philosophy in general, but from a particular school of philosophy. There is “philosophy” and then there is “philosophy.” My critics should be up front and advance their claims as representative of their own philosophy, or the particular school of philosophy they adhere to, not as representative of philosophy in general.

“What do Philosophers Believe?

So I am pleased to see the on-line publication of the paper “What Do Philosophers Believe?“ by David Bourget and David J. Chalmers. This study confirms that philosophers are indeed divided on a number of issues – they hold a range of beliefs which can influence their philosophical thoughts and positions. These beliefs are influenced by a range of demographic and social factors. And philosophers themselves often have a false opinion of the degree to which different beliefs are common in their professional community.

Sean Carroll, at What Do Philosophers Believe?, and Jerry Coyne at The consensus of philosophers, have commented briefly on the paper. Have a look at those articles, or the paper itself (download here), for a full list of beliefs and their degree of support among philosophers. But here are a few which seem relevant to debates I have had here. (Sorry about the briefness of the terms – that’s related to the nature of the survey):

1. A priori knowledge: yes 71.1%; no 18.4%; other 10.5%.

5. Epistemic justification: externalism 42.7%; internalism 26.4%; other 30.8%.

6. External world: non-skeptical realism 81.6%; skepticism 4.8%; idealism 4.3%; other 9.2%.

8. God: atheism 72.8%; theism 14.6%; other 12.6%.

10. Knowledge: empiricism 35.0%; rationalism 27.8%; other 37.2%.

15. Metaphilosophy: naturalism 49.8%; non-naturalism 25.9%; other 24.3%.

16. Mind: physicalism 56.5%; non-physicalism 27.1%; other 16.4%.

18. Moral motivation: internalism 34.9%; externalism 29.8%; other 35.3%.

20. Normative ethics: deontology 25.9%; consequentialism 23.6%; virtue ethics 18.2%; other 32.3%.

25. Science: scientific realism 75.1%; scientific anti-realism 11.6%; other 13.3%.

So I feel vindicated in answering my critics by pointing out the lack of consensus among philosophers on many issues. What right has a philosopher of religion to assure me their arguments against my statements are “philosophical” (and not just representative of a school of religious philosophy)? Similarly, why should I simply take on trust assurances that “philosophy” has a particular position on scientific realism, moral motivations or the nature of ethical norms?

There is “philosophy” and there is “philosophy.” If you wish to lecture me about philosophical positions at least be open about the philosophical school you are representing or adhere to.

No suprise at differences

Frankly, I am unsurprised at the lack of consensus among philosophers. It contrasts sharply with the situation in science – which on most matters has a high degree of consensus. OK, there are debates at the edges – and these can be intense. Remember the scene in “The Big Bang Theory” where a romantic alliance between two physicists broke up because one was a “String Theorist‘ while the other adhered to “Loop Gravity“.  Just imagine the problems they would have raising their children!

Ben Goren commented at Jerry’s website on the poor philosophical consensus compared with science :

“Survey a bunch of scientists on comparable topics, and you’ll find overwhelming consensus that, for example: Evolution is true; Relativity and Quantum Mechanics are basically right on (and anything that replaces either is going to have to reduce to both at suitable scales); that the Earth’s surface moves in manners described by Plate Tectonics; and so on.

Yet these jokers are doing good just to get a slim majority that don’t think that we’re all literally outside of our brains.”

But while we should be aware of the different levels of confidence in philosophical and scientific knowledge this  does not show differences in personal capabilities between the two professions. The difference is exactly what we should expect from the different nature of the two subjects.

Philosophy could be said to be an “armchair” subject. Philosophers reason and think. They apply logic to hypothetical situations. Often scenarios which have no possible reality but are at least “logical possibilities” will get a lot of attention. It’s also not surprising that demographic and social factors can influence philosophical reasoning. Humans are just not very rational and their reasoning often suffers from ideolgical and social motivations.

Science is usually a very much “hands on” subject. Ideas are tested against reality. Scientists are just as irrational (or human) as anyone else – they also easily fall into the trap of motivated reasoning. But the final arbiter of ideas for science is reality itself. Experiments can be performed or observations made to check predictions of hypotheses.

Of course philosophy and science does merge at the edges. There is actually a field of experimental philosophy and good philosophers do pay attention to scientific knowledge. On the other hand some science cannot always be tested in practice – at least with the current technological limits. Some scientists seem to work more like philosophers – and some philosophers work more like scientists.

But let’s get away from the idea that logic or philosophy is the final arbiter of knowledge. That is taking philosophy beyond its limits.

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