This chapter is about the Preliminary Question, but extended into three areas of philosophy: (1) Draws on Bertrand Russell’s view that there is no truth in philosophy but only in the sciences. (2) Looks at the question of life after death and at the agnostic argument, according to which both those who believe in life after death and those who reject it are mistaken. (3) Is about the disputes concerning Hume’s (alleged) retraction of his theory of personal identity. For while Hume scholars believe that Hume retracted his theory, they dispute why he did so. What I try to show here is that when the Preliminary Question is asked it turns out that all the disputants are mistaken.