Hindsight bias.
If X happened, then X must have deserved to happen. In this case, if Voldemort failed, then our bias is to assume all Voldemort's choices must have been bad ones, and all of Voldemort's enemies' choices must have been good ones.
However, this is complicated when looking at a deliberately told story, because storytellers choose stories for being what they feel are representative cases of true things. In other words, just as there's a difference between you picking a card at random and me choosing a card and handing it to you, there's a difference between you looking at a random failed politician, and me choosing to tell you a story about a particular failed politician.
Thus, the original Harry Potter story represents Rowling's views about what matters, not a random selection from actual events, and so too HPMOR represents EY's views about what matters, not a random variation on the original story.
None of which means hindsight bias isn't an issue - but the storyteller's bias, or accurate judgment, is also an issue.
In this case, peculiarly, hindsight bias might be more likely than average, because the author of the story is trying to illustrate the challenges and methods of being rational.
I thought hindsight bias was specifically about believing something was higher probability than it really was simply because it did in fact happen.
I suppose what I mean is the collection of biases which causes people to choose interpretations of their past actions that reflecting favorably upon them.
The new thread, discussion 13, is here.
This is a new thread to discuss Eliezer Yudkowsky's Harry Potter and the Methods of Rationality and anything related to it. With three chapters recently the previous thread has very quickly reached 1000 comments. The latest chapter as of 25th March 2012 is Ch 80.
There is now a site dedicated to the story at hpmor.com, which is now the place to go to find the authors notes and all sorts of other goodies. AdeleneDawner has kept an archive of Author's Notes. (This goes up to the notes for chapter 76, and is now not updating. The authors notes from chapter 77 onwards are on hpmor.com.)
The first 5 discussion threads are on the main page under the harry_potter tag. Threads 6 and on (including this one) are in the discussion section using its separate tag system. Also: one, two, three, four, five, six, seven, eight, nine, ten, eleven.
As a reminder, it's often useful to start your comment by indicating which chapter you are commenting on.
Spoiler Warning: this thread is full of spoilers. With few exceptions, spoilers for MOR and canon are fair game to post, without warning or rot13. More specifically: