 Just as Kripke claims that some truths are necessary without being a priori, he argues that a truth can be a priori without being necessary. To use an example of Gareth Evans’s (1982), suppose that I introduce the term ‘Julius’ by stipulating that it is to refer rigidly to the person who is in fact the inventor of the zip (if such a person exists). Then it may appear that I don’t need further empirical evidence to know that