Wed Oct 25, 2017
234 Moses, 6–7:30 PM
|Working Group in the History and Philosophy of Logic, Mathematics, and Science
Robert May (UC Davis)
What is sense? Frege’s answer is this: Sense is what makes a reference thinkable such that in virtue of thinking this way an agent has grounds for making a judgement. In this talk, I explore this conception, which places sense at the crux of Frege’s account of judgement. The central claim is that sense is a composite notion, split between what makes a reference thinkable (mode of determination) and how we think of references (mode of presentation). These are related via grasp: an agent who grasps a mode of determination of a reference has a mode of presentation of that reference, and accordingly has grounds for making a judgement. This is crucial to understanding how Frege responded to the threat to logicism posed by the identity puzzle, viz. that a = b requires a special act of recognition in judgement. But it does, perhaps surprisingly, leave open the analysis of a = a.