AT the beginning of the third part of the Theaetetus , Socrates entertains an interesting theory of knowledge in the form of a ‘dream’. In Cornford's translation, it reads as follows: I seem to have heard some people say that what might be called the first elements () of which we and all other things consist are such that no account () can be given of them. Each of them just by itself can only be named; we cannot attribute to (...) it anything further or say that it exists or does not exist; for we should at once be attaching to it existence or nonexistence, whereas we ought to add nothing if we are to express just it alone. We ought not even to add ‘just’ or ‘it’ or ‘each’ or ‘alone’ or ‘this’, or any other of a host of such terms. (shrink)