Strategy, like markets, is anti-inductive. As Edward Luttwak says somewhere, "all success tends to failure". When you win a battle or a war, your enemies and onlookers concerned that you may turn on them will learn from what you did, and look for counters, while you will be tempted to rely on what worked. But if you do that, you are attributing your success to the wrong place: on what you did instead of on the relationship between what you did and what your enemies did.
Harry hasn't repeated himself yet: to all new challenges he has found new responses.
Sure, but I think it would be better to think of potion making at a very high level in strategy. Harry used transfiguration in battle after battle and managed to win. Do you think of that as not innovating? I think there is a similar relationship between ball bearings and skateboards and suits of armor in the transfiguration category and potion of sunlight and whatever comes next in the potion making category.
(The HPMOR discussion thread after this one is here.)
This is a new thread to discuss Eliezer Yudkowsky's Harry Potter and the Methods of Rationality and anything related to it. There haven't been any chapters recently, but it looks like there are a bunch in the pipeline and the old thread is nearing 700 comments. The latest chapter as of 7th March 2012 is Ch. 77.
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.
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.
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: