The butterfly effects would add up and and any zygote formed would not be the hitler-as-we-know anymore, since it would be a different combination of sperm and eggs.
Who needs guns when you got a time machine? Don’t like your highschool bully, just bump into their parents back in time. Or you know, “bump” ( ͡° ͜ʖ ͡°) into their parents.
I disagree. If you made a change in 2000 you had already made it when whatever happened in 2025 happened. If you went back and killed Hitler in 1885 that had already happened in 1933 when Hitler was appointed Chancellor. What happened in 1885 didn’t change what happened in 1933. Maybe you killed the wrong person. Maybe history got wrong who Hitler was. Maybe Hitler assumed the identity of the dead infant and went on to be appointed Chancellor. The point is that whatever happened in 1935 happened after whatever happened in 1885.
Edit: It’s called an ontological paradox.