Depends what you mean in regards to rewriting. If there's a position that runs counter to our current scientific consensus, I think it should be updated to reflect the current consensus, but when I was reading my history/physics books they would cover what people believed at a particular time period. I don't see any issue with that. We're always learning more about the world around us. We are not an omniscient species.

Unless there's a more specific example you can think of w.r.t rewriting.