- S: A thing can be in one place at two different times, but it cannot be in two different places at one time.
- T: A thing can move back and forth in space, but it cannot move back and forth in time.
- On a second view, S appears to be quite simply false. For a thing can be in one place at two different times if and only if the two different times are both included in the entire stretch of time which the thing passes at that place. And similarly, a thing can be in two different places at one time if the two different places are both included in the entire stretch of space which the thing extends through at that time.
- But on a third view it appears true again. A thing can pass out of a place and then return to it later, in which case the two stretches of time it spends there are not continuous with each other. But a thing, we want to say, cannot be at a given time in two stretches of space which are not continuous with each other. And it was because of this that on a first view S appeared to be true.
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