In setting out to discuss the trouble with Kant I may seem to be suggesting that there is only one. I do think that there is one fundamental one, which is that he is a wild and intellectually irresponsible arguer. Any innate leaning that way must have been enhanced by the intellectual isolation of Konigsberg, which preserved him from serious criticism. I shall be sticking to one particular example of this failing. It is the account he gives of the way in which the common world of experience is constructed or synthesized by applying some piece of mental apparatus—the forms of intuition and the categories—to what he calls the manifold of sensation. The rather elementary question I want to raise about this theory is that of how the claim can be made good that the outcome of this process is just one, single world; for all of us, for each of us at different times, even for any one of us at a particular time.