How old can a person be?

I think it depends on genes,health,and things like that.

.-. Depends of a lot of facts....Where and how do you live, genes, health...

It depends.

The oldest man alive right now was born closer to the date of the signing of the Declaration of Independence than to the present day.

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100 at least

Depends, on there habits, and lifestyle choices.

well, generally, people don't live for more than 100 years, but hey, things can happen