Essays

Thus far, three of our episodes (12, 25 and 28 have contained some discussion of possible worlds semantics. Most memorably, we learned in our last episode that John Searle is rather critical of the enterprise. But what is possible worlds semantics? Let’s take a look. This possible worlds business originally stems from the work of 17th-century philosopher and polymath, Gottfried Wilhelm Leibniz. Leibniz got the ball rolling on possible worlds by putting forth the idea that a statement is necessarily true just in case it is true in all possible worlds, and possibly true just in case it is true in some possible world....

Thus far, a number of our interviews have alluded to what philosophers of language call indexical expressions. (In particular, episodes 12, 25, and 27.) Although the theory of what these words and phrases mean represents one of the major developments in philosophy over the past fifty or so years, it can seem counterintuitive at first. Since the questions these words raise are unusually subtle and difficult, we thought it might be worthwhile to go over some of the basics....