75th comments on Harry Potter and the Methods of Rationality discussion thread, January 2015, chapter 103 - Less Wrong Discussion
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Comments (173)
If Harry gains access to arbitrarily powerful time travel (That's how I've interpreted your scenario. I apologize if I'm wrong.), doesn't that make the whole plot redundant? Can't Harry just go back to the beginning and tell himself everything?
That would pretty much DELETE ALL THE PEOPLE AFFECTED and REPLACE THEM WITH DIFFERENT VERSIONS, so I don't think Harry would do that.