Some thoughts

[Sailor Steve]

Originally Posted by Platapus

Why would we assume that if we "traveled" back in time that we would maintain our "current" state of understanding?

If that's true then there's no point in assuming we're not travelling back and forth in our own timeline all the time, on the basis that we wouldn't know if we were. The point of time travel is to figure out how to travel independent of our own timeline. If we can't do that then there's no point in trying to travel in time anyway.