Evolutionary naturalism provides an account of our capacities that undermines their reliability, and in doing so undermines itself...I agree with Alvin Plantinga that...the application of evolutionary theory to the understanding of our own cognitive capacities should undermine, though it need not completely destroy, our confidence in them. Mechanisms of belief formation that have selective advantage in the everyday struggle for existence do not warrant our confidence in the construction of theoretical accounts of the world as a whole. I think the evolutionary hypothesis would imply that though our cognitive capacities could be reliable, we do not have the kind of reason to rely on them that we ordinarily take ourselves to have using in them directly--as we do in science. Thomas Nagel, Mind and Cosmos, 27-28 (emphasis in original)
A non-trivial (albeit not the most fundamental) feature of Nagel's book (recall my here, here, here; see Feser's response to me and also Mohan's posts: here, here, here and here) is his reliance on Plantinga's so-called evolutionary argument against naturalism (hereafter EAAN; see also pp. 74-78). Let's leave aside the fact that Nagel pretends in his book that this (evolving) EAAN argument has not been subject to significant criticism. (It must be convenient to think that one is obliged to engage only with one's referee [Sober, although even his criticism of EAAN is ignored], one's colleague [Street], one's cheerleader [Plantinga], and one's deus ex machina [Hawthorne & Nolan].) Here I explore a response to this style of argument that is overlooked by Nagel and, I think, not explored in the literature (but would love to learn otherwise--it's not my field). So, let's grant -- for the sake of argument -- the claim that "Mechanisms of belief formation that have selective advantage in the everyday struggle for existence do not warrant our confidence in the construction of theoretical accounts of the world as a whole." What follows from this?
My quick and dirty answer is: nothing. For the crucial parts of science really do not rely on such mechanisms of belief formation. Much of scientific reason is or can be performed by machines; as I have argued before, ordinary cognition, perception, and locution does not really matter epistemically in the sciences.
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