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Time travel the double-occupancy paradox. the psychologist’s argument 1. If the time machine were traveling into the future, we would see it right now.

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Presentation on theme: "Time travel the double-occupancy paradox. the psychologist’s argument 1. If the time machine were traveling into the future, we would see it right now."— Presentation transcript:

1 time travel the double-occupancy paradox

2 the psychologist’s argument 1. If the time machine were traveling into the future, we would see it right now. 2. We don’t see it right now. 3. [So] The time machine isn’t traveling into the future. 4. If the time machine were traveling into the past, we would have seen it on Thursday. 5. We didn’t see it on Thursday. 6. [So] The time machine isn’t traveling into the past. 7. If (3) and (6), then the time machine isn’t traveling in time. 8. [So] The time machine isn’t traveling in time.

3 the psychologist’s argument 1. If the time machine were traveling into the future, we would feel it right now. 2. We don’t feel it right now. 3. [So] The time machine isn’t traveling into the future. 4. If the time machine were traveling into the past, we would have felt it on Thursday. 5. We didn’t feel it on Thursday. 6. [So] The time machine isn’t traveling into the past. 7. If (3) and (6), then the time machine isn’t traveling in time. 8. [So] The time machine isn’t traveling in time.

4 The revised argument 1. If the time machine were traveling continuously into the future, we would see it right now. 2. We don’t see it right now. 3. [So] The time machine isn’t traveling continuously into the future. 4. If the time machine were traveling continuously into the past, we would have seen it on Thursday. 5. We didn’t see it on Thursday. 6. [So] The time machine isn’t traveling continously into the past. 7. If (3) and (6), then the time machine isn’t traveling continuously in time. 8. [So] The time machine isn’t traveling continuously in time.

5 the double-occupancy paradox 1. If continuous travel into the past is possible, then double occupancy in possible. 2. Double occupancy isn’t possible. 3. [So] Continuous travel into the past isn’t possible.


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