Time travel van inwagen’s response. the altered past paradox 1. If time travel is possible, then one can change the past. 2. One cannot change the past.

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Presentation transcript:

time travel van inwagen’s response

the altered past paradox 1. If time travel is possible, then one can change the past. 2. One cannot change the past. 3. [So] Time travel is not possible.

the anti-change argument 1. For any x, if it is possible for x to change (in the qualitative sense), it is possible for x to have different properties at different times. 2. It is not possible for the past to have different properties at different times. 3. [So] It is not possible for the past to change.

the anti-growth argument 1. For any x, if it is possible for x to grow, it is possible for x to be different sizes at different times. 2. It is not possible for time (i.e., the temporal manifold) to have different sizes at different times. 3. [So] It is not possible for time to grow.