That's what is known as a 'non-paradox', i.e., something that looks like a paradox, but isn't.
The most common one is, 'Time travel has been invented. I'm going to go back in time to kill the person who invented it, so there won't be any time travel.' Well, if you'd succeeded in that endeavour, you wouldn't have been able to travel back in time in the first place.
In the case of the OP, since there aren't people from 10 000 years in the future running about in the here-and-now, that's a pretty good indication that time travel hasn't been invented. QED.
Boru
The most common one is, 'Time travel has been invented. I'm going to go back in time to kill the person who invented it, so there won't be any time travel.' Well, if you'd succeeded in that endeavour, you wouldn't have been able to travel back in time in the first place.
In the case of the OP, since there aren't people from 10 000 years in the future running about in the here-and-now, that's a pretty good indication that time travel hasn't been invented. QED.
Boru
‘I can’t be having with this.’ - Esmeralda Weatherwax
