On being spread out in time
temporal parts and the problem of change
pp. 131-147
in: Wolfgang Spohn, Brian Skyrms, Bas C. van Fraassen (eds), Existence and explanation, Berlin, Springer, 1991Abstrakt
What is change? There are two opposed views: the substratum view, which goes back to Aristotle, and the replacement view, which goes back at least to Hume. The substratum view is that change consists in an object (the substratum) having first one attribute, then another attribute contrary to the first.
