= 27d567bc2d48d9f40e9ccc20ea370b15)
Normal_Anomaly comments on Harry Potter and the Methods of Rationality discussion thread, part 5 - Less Wrong
You are viewing a comment permalink. View the original post to see all comments and the full post content.
= 783df68a0f980790206b9ea87794c5b6)
Loading…= b715d02e85f7b3b4ae65ca3d3e450868)
Subscribe to RSS Feed
Powered by Reddit
= f037147d6e6c911a85753b9abdedda8d)
You are viewing a comment permalink. View the original post to see all comments and the full post content.
Comments (648)
Chapter 61: 'There was another pause, and then Madam Bones's voice said, "I have information which I learned four hours into the future, Albus. Do you still want it?"'
This seems like a useless question. A bit of information was already conveyed representing the fact that Amelia Bones was 4 hours into the future & found some information that would be useful to Dumbledore. Is this not sufficient information transfer in and of itself to prevent Dumbledore traveling backwards?
Sorry if I'm confused, but reasoning about time is hard, and my diagrams are not as helpful as Snape's and Dumbledore's.
I think the info was sent to Bones rather than her finding it and going back, but your point may still stand. Perhaps "somebody sent something back to Amelia Bones" is vague enough to slip past the filter. There must be some nonzero cutoff, because otherwise the info would affect the whole future (from the point of receiving the info) light come of anyone who got time-traveled info, and the whole earth would be interdicted whenever somebody went back.
If I'm wrong about that, it's possible that either Bones or Dumbledore wasn't thinking, or Dumbledore realized that he was already blocked and that's part of why he decided he wanted the info.
Amelia Bones learns something at time x is an event happening at time x and information of that event could be taken back to time x - 6. If the information that she gets is from time x + 4 then that information could only go back to time x-2.
But she got information from time x + 4: the fact that there was interesting information to get at that time.
Think of all of the logic puzzles where you have (just) enough information to deduce that somebody else had enough information to deduce that somebody else … etc.