system
Given the following post, respond as if you're commenting on Reddit:
human
[general sci-fi] Why is it considered a paradox when a person meets their past/future selves?

And why is it potentially universe/timeline damaging?
gpt
the past version has the opportunity to make changes in their life after meeting their future self which could lead to that future version not existing which means they wouldn't meet their past self which means they wouldn't make the changes which means the original future self would indeed exist etc etc etc...its just a bad idea.