Michael Shepanski

The Value of Evidence thesis (VE) tells us to gather evidence before deciding in any decision problem, if the evidence is free. This appar- ently plausible principle faces two problems. First, it fails on evidence externalism or nonclassical decision theories. Second, it’s not general enough: it tells us to prefer gaining free evidence to gaining no evi- dence, but it doesn’t tell us to prefer gaining more informative evidence to gaining less informative evidence when both are free. This paper defends an alternative value-of-evidence principle that solves the above two problems. We call it ‘the Comparative Value of Evidence for the Resolute (CVER).’ CVER not only generalizes VE to the comparative case but is also compatible with evidence externalism and nonclassical decision theories. Our argument, if successful, broadens the scope of the value-of-evidence principle and shows that it’s more robust than previously imagined.

There are two main parts to this article: (1) Quine's view of truth is substantive in a way that is not generally recognized. There are elements in the view of deflationism, minimalism, and of course disquotationalism to be sure, but from Quine's perspective the capacity for generalization - ascribing truth not to explicitly given sentences but to kinds of sentences - requires a full-bore Tarskian apparatus. This is necessary in order for truth to play what for Quine are its vital roles in science, philosophy (epistemology and those parts of metaphysics that Quine recognizes), and crucially in logic itself. (These points have not been made with adequate care in the literature). (2) But is Tarskianism sufficient for playing all of those roles? Contrary to an interesting article by Lars Bergström - I argue that it is indeed sufficient, at least from Quine's point of view, and to see the point is to appreciate how thoroughgoing and powerful the notion of truth is, despite its being, 'in itself', only a device of sentential generalization. This dovetails with Quine's famous naturalism, a connection which I bring out at the end.