Presentism is a school of philosophy that holds that neither the future nor the past exist, and there are no non-present objects. In this view, time travel is impossible because there is no future or past to travel to. However, some 21st-century presentists have argued that although past and future objects do not exist, there can still be definite truths about past and future events, and thus it is possible that a future truth about a time traveler deciding to travel back to the present date could explain the time traveler's actual appearance in the present
воскресенье, 3 мая 2015 г.
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Spacetime is a concept like the color spectrum. It describes the activity of brains and eyes, not the functionality of black holes and solar systems. It is a neuropsychological term, not an astrophysical one."
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