He was undoubtedly more optimistic about the trademark argument than we can be because he inherited a number of ideas from previous philosophical traditions. One very important one is that genuine causation is a matter of the cause passing on something to an effect. Causation is like passing the baton in a relay race. So, for example, it takes heat to make something hot, or movement to induce motion. This is a principle that surfaces again and again in the history of philosophy, and we shall encounter it more than once. Here it disposed Descartes to think that the ‘perfection’ in his idea
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