  These three uses of pronouns seem quite different. Consequently, Kaplan (1989b, p. 572) sometimes says that ‘he’ is lexically ambiguous, and that the demonstrative ‘he’ and the anaphoric ‘he’ are homonymous expressions (Kaplan 1989b, p. 593). Most theorists, however, do not hold that these pronouns are ambiguous or that these uses involve distinct homonymous words. Many theorists who work on demonstratives and anaphora emphasize their similarities to variables. For demonstratives and variables, see Heim and Kratzer 1998, chapter 9; for anaphora and variables, see Kamp and Reyle 1993, Chierchia 1992, and Salmon 2006. For related discussion, see Partee (1989), Condoravdi and Gawron (1996), and Neale (2005).