 There are a number of much-debated issues that arise in connection with the interpretation of various parts of Turing (1950), and that we have hitherto neglected to discuss. What has been said in the first two sections of this document amounts to our interpretation of what Turing has to say (perhaps bolstered with what we take to be further relevant considerations in those cases where Turing’s remarks can be fairly readily improved upon). But since some of this interpretation has been contested, it is probably worth noting where the major points of controversy have been.