I was told that a time machine hasn't and will never be invented, because if it had been we would know (e.g. they would have come back and we would be aware of the time travellers existence) the bit I can't get is, say the machine is invented in the year 4000ad, in the future ,so it hasn't been invented yet, how can we know it won't be invented then and go back and change history? If they go back from the year 4000ad and kill Hitler then this would obviously change history so the fact that no historical event ever mentions people from future does this mean it will never happen or just not yet?
Stupid question I know but I can't get mey head round it.
2007-06-24
20:58:14
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30 answers
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asked by
ordinaryarmy
1