Very long time, no blog. The main reason is a cross-country move and a new job. For those who don't already know, I'm now at Hobart & William Smith Colleges, in upstate New York. But I also spent a very nice 2+ weeks in Australia, seeing old grad school friends as well as meeting new family members.
A discussion with a student today brought up an interesting question (which probably has been extensively explored in a literature of which I'm completely ignorant). We were talking about what sorts of linguistic expressions were truth-valued, and which were not. She suggested that there might be some sort of connection between being the kind of thing that has a truth-value, and being the kind of thing that can have evidence count for or against it. But what's the connection between these two conditions? Necessary? Sufficient? Neither? Both? -- and is there already a thorough treatment of this question in the literature?
Note: As I understand it, this is not a variant of verificationism, since one can imagine evidence that is unavailable to us weak, frail humans, with our very limited epistemic powers.
Note 2: If you take the position that the sentence 'Planet Vulcan is between Mercury and the Sun' is truth-valueless, instead of false, then that sentence is an example where we have evidence against a claim, but it nonetheless lacks a truth-value. But maybe the other direction of the connection would still hold?