On the Arbitrariness Objection to the Threshold View

Proponents of the ‘Threshold View’ have held that to believe a proposition is to be sufficiently confident of the proposition’s truth, but that there is no sharp cutoff between degrees of confidence that constitute belief and degrees of confidence that do not. Brian Weatherson has objected that no plausible account of vagueness can support this view. In this paper, I reply to Weatherson’s objection. Along the way, I identify a way in which one might hope to maintain the Threshold View without a fuzzy threshold, and I reformulate the Threshold View to accommodate fuzzy thresholds without begging substantive questions about vagueness.

Loose Constitutivity and Armchair Philosophy

Standard philosophical methodology which proceeds by appeal to intuitions accessible "from the armchair" has come under criticism on the basis of empirical work indicating unanticipated variability of such intuitions. Loose constitutivity---the idea that intuitions are partly, but not strictly, constitutive of the concepts that appear in them---offers an interesting line of response to this empirical challenge. On a loose constitutivist view, it is unlikely that our intuitions are incorrect across the board, since they partly fix the facts in question. But we argue that this ratification of intuitions is at best rough and generic, and can only do the required methodological work if it operates in conjunction with some sort of further criteria of theory selection. We consider two that we find in the literature: naturalness (Brian Weatherson, borrowing from Lewis) and charity (Henry Jackman, borrowing from Davidson). At the end of the day, neither provides the armchair philosopher complete shelter from extra-armchair inquiry.