vanesch said:You can of course ask the question how you could change history and nevertheless know it. How can you know what Hitler "did/will do in the 30-45" when you are going to change it ? Hell, maybe you're even at *the origin* of Hitler's behaviour. Maybe Hitler (the one that was elected in 1930) wasn't such a bad guy, but you killed him, and the Nazi's replaced him by a sozie ? Or maybe you tried to kill him, you failed, and that got Hitler paranoia ?
Or maybe there are parallel time lines in which in one line, we have Hitler the way we know him, and in another line, you kill Hitler.
But one thing is sure: you cannot KNOW in 1930 what you know of what happened in 2005, if you have the ability to change it.
So OR you can know it, and that means you cannot change it, OR you cannot know it (because you can change it and then it will of course not happen, hence it will be unknowable), OR both happen in any case in parallel worlds. But you cannot "know" something that will not happen. You can maybe THINK you know it, but then you're just deluded.
The other question is: imagine that you could eliminate Hitler. The question is: where would we be today ? Would the world in 2005 be better or worse off without Hitler ?
Maybe not having had Hitler would not have pushed the US to devellop an atomic weapon, and maybe Stalin did devellop it, after which he launched a total thermonuclear war ?
When one walks blind-folded he/she tends to lean towards one side, or the other. Therefore, if given enough time (5 pages) the subject will exhaust his/her/its range and begin a circular cycle. All apparent possibilities have been touched and thoroughly repeated, I wonder if anyone has any UNIQUE ideas or can offer a deeper analysis.