Abstract
Experimental philosophy is an extension of the Naturalists’ Challenge to the use of intuitions in philosophy. This chapter explores this challenge and traditional or “armchair” responses to it, focusing especially on the case of reference. It first considers the role and nature of intuitions, along with two kinds of experimental philosophical challenges to their use: the challenge from irrelevant determination and the challenge from diversity. It then explores using the challenge from diversity to undermine the reliability of intuitions as evidence for the truth of philosophical claims, and examines critical responses to the challenge from diversity. The chapter concludes by evaluating the possibility that diversity in responses to thought experiments occur even within individuals, and the implications of this for the Naturalists’ Challenge.