Abstract
I discuss the treatment by Chisholm of the problem posed by the fact that one can produce some neuro-physiological changes by moving a limb, namely the ones which cause the motions. I concentrate largely on the treatment Chisholm gave to this question before Person and Object, and I compare it with von Wright's discussion of it, I conclude that there are correct elements about both but that both are unsatisfactory, Chisholm's because it entails that we must know something which we manifestly need not know when we move.