 Mellor’s proposal is that I perceive x precede y by virtue of the fact that my perception of x causally affects my perception of y. As I see the second hand in one position, I have in my short-term memory an image (or information in some form) of its immediately previous position, and this image affects my current perception. The result is a perception of movement. The perceived order of different positions need not necessarily be the same as the actual temporal order of those positions, but it will be the same as the causal order of the perceptions of them. Since causes always precede their effects, the temporal order perceived entails a corresponding temporal order in the perceptions. Dainton (2001) has objected to this that, if the account were right, we should not be able to remember perceiving precedence, since we only remember what we can genuinely perceive. But there seems no reason to deny that, just because perception of precedence may involve short-term memory, it does not thereby count as genuine perception.