Group items tagged

scientific theories – especially theories of the ultra-speculative kind that preoccupy theoretical physicists like Hawking – involve a great deal of covert philosophising which may or may not turn out to promote the interests of knowledge and truth. This had better be recognised if we are not to be taken in by a false appeal to the authority of science as if it possessed the kind of sheer self-evidence or indubitable warrant that could rightfully claim to evict ‘philosophy’ as a relic from the pre-scientific past.

Here Hawking’s argument shows all the signs of a rudderless drifting between various positions adopted by different philosophers from Kant to the present. He spends a lot of time on what seems to be a largely unwitting rehash of episodes in the history of idealist or crypto-idealist thought, episodes which have cast a long shadow over post-Kantian philosophy of science. That shadow still lies heavy on Hawking’s two central ideas of M-theory and model-dependent realism. They both look set to re-open the old Kantian split between a ‘noumenal’ ultimate reality forever beyond human knowledge and a realm of ‘phenomenal’ appearances to which we are confined by the fact of our perceptual and cognitive limits. So if Hawking is right to charge some philosophers with a culpable ignorance of science then there is room for a polite but firm tu quoque, whether phrased in terms of pots calling kettles black or boots on other feet. For it is equally the case that hostility or indifference toward philosophy can sometimes lead scientists, especially those with a strong speculative bent, not only to reinvent the wheel but to produce wheels that don’t track straight and consequently tend to upset the vehicle.

Indeed, there is a sense in which the scientific enterprise stands or falls on the validity of counterfactual-conditional reasoning, that is to say, reasoning from what necessarily would be the case should certain conditions obtain or certain hypotheses hold. In its negative guise, this kind of thinking involves reasoning to what would have been the outcome if certain causally or materially relevant factors had not been operative in some given instance. Hawking constantly relies on such philosophical principles in order to present and justify his claims about the current and likely future course of developments in physics. Of course he is very welcome to them but he might do better to acknowledge their source in ways of thinking and protocols of valid argumentation that involve distinctly philosophical as well as scientific grounds.

To speak plainly: one useful job for the philosopher of science is to sort out the errors and confusions that scientists – especially theoretical physicists – sometimes fall into when they give free rein to a speculative turn of mind.

To adapt the economist Keynes’ famous saying: those scientists who claim to have no use for philosophy are most likely in the grip of a bad old philosophy or an insufficiently thought-out new one that they don’t fully acknowledge.

There is a large supply of present-day (quasi-)scientific thinking at the more – let us say – creative or imaginative end of the scale that falls into just this hybrid category of high-flown metaphysical conjecture tenuously linked to certain puzzling, contested, or at any rate far from decisive empirical results.

these are pseudo-dilemmas brought about by a mixture of shaky evidence, dubious reasoning on it, fanciful extrapolation, and a flat refusal to entertain alternative theories (such as that of the physicist David Bohm) which considerably lighten the burden of unresolved paradox.