this post was submitted on 08 May 2025
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Ignoring space for a moment, it depends whether you see time as a single - linear - dimension, or as a set of n dimensions.
If time can only exist as a single dimension, then yes, we'd have a paradox.
If time is two-(or more)-dimensional, then you'd just step into a parallel timeline/dimension for every change made, forsaking the old timeline Steins' Gate-style.
Obviously, 2+ dimensional time cannot be proven, so it's just a fun thought experiment. It's not entirely unlike the hypothetical 4th dimension of space - which would leave space-time with 4 dimensions of space and one of time.