In fact, travel to the past must not exist in science, so there is no need to bring science. Go to the movie to understand, because it must be that
when I watched Doraemon before, the cartoonist did not complete the comics before the deadline, so he borrowed Dora's time machine to the future, bought his own comics from the bookstore, and then went back. Copy and resubmit.
So who actually drew the comics?
So when the first H1 did not become H2, who stabbed H1?
Why can H2 still clearly recall what he saw at that time and restore it perfectly?
Over time, won't the time and space where H3 be located usher in more of itself?
Obviously it can't be released. If it can be released, there will be no movie...
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