 Less important than linguistic usage in various domains is whether our theorizing captures the relevant psychological and epistemological joints to be found in the world. The focus of the present entry is the role of intuitions in distinctively philosophical (and other “armchair”) inquiry. It is plausible (and will be assumed here, but see Nado 2014 for doubts) that the intuitions of interest in philosophy constitute a single epistemic and psychological kind exemplified by [I1]–[I4] and by many additional examples which appear in  §2.2  and  §2.3  below, but not the sort noted in the previous paragraph.