H.G.'s glasses paradox
If his first pair of glasses is broken when he goes into the future some 96 yrs does that mean his 2nd will be broken during the return trip? If so there is a nice little paradox in the offing. His 2nd pair were still in the drawer of his desk when he went into the future, and apparently he didn't change prescriptions between 1893 and when he died so if his 2nd pair breaks on the return trip he has a pair of glasses that might be both broken and unbroken at one and the same time. There was a similar paradox in Star Trek 4 The Voyage Home when Kirk sells his glasses for money in our present knowing that they will be a gift from Dr. McCoy in the future which is to him already the past.
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