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time travel

time travel. the double-occupancy paradox. If the time machine were traveling into the future, we would see it right now. We don’t see it right now. [So] The time machine isn’t traveling into the future. If the time machine were traveling into the past, we would have seen it on Thursday.

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time travel

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  1. time travel the double-occupancy paradox

  2. If the time machine were traveling into the future, we would see it right now. • We don’t see it right now. • [So] The time machine isn’t traveling into the future. • If the time machine were traveling into the past, we would have seen it on Thursday. • We didn’t see it on Thursday. • [So] The time machine isn’t traveling into the past. • If (3) and (6), then the time machine isn’t traveling in time. • [So] The time machine isn’t traveling in time. the psychologist’s argument

  3. If the time machine were traveling into the future, we would feel it right now. • We don’t feel it right now. • [So] The time machine isn’t traveling into the future. • If the time machine were traveling into the past, we would have felt it on Thursday. • We didn’t feel it on Thursday. • [So] The time machine isn’t traveling into the past. • If (3) and (6), then the time machine isn’t traveling in time. • [So] The time machine isn’t traveling in time. the psychologist’s argument

  4. If the time machine were traveling continuously into the future, we would see it right now. • We don’t see it right now. • [So] The time machine isn’t traveling continuously into the future. • If the time machine were traveling continuously into the past, we would have seen it on Thursday. • We didn’t see it on Thursday. • [So] The time machine isn’t traveling continously into the past. • If (3) and (6), then the time machine isn’t traveling continuously in time. • [So] The time machine isn’t traveling continuously in time. The revised argument

  5. If continuous travel into the past is possible, then double occupancy in possible. • Double occupancy isn’t possible. • [So] Continuous travel into the past isn’t possible. the double-occupancy paradox

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