Eliezer Yudkowsky: Harry Potter and the Methods of Rationality

4. If Harry raises his wand or speaks in anything except Parseltongue, theDeath Eaters will fire on him immediately.

5. If the simplest timeline is otherwise one where Harry dies—if Harry cannot reach his Time-Turner without Time-Turned help—then the Time-Turner will not come into play.

6. It is impossible to tell lies in Parseltongue.

Within these constraints, Harry is allowed to attain his full potential as a rationalist, now in this moment or never, regardless of his previous flaws.

Of course ‘the rational solution’, if you are using the word ‘rational’ correctly, is just a needlessly fancy way of saying ‘the best solution’ or ‘the solution I like’ or ‘the solution I think we should use’, and you should usually say one of the latter instead. (We only need the word ‘rational’ to talk about ways of thinking, considered apart from any particular solutions.)

And by Vinge’s Principle, if you know exactly what a smart mind would do, you must be at least that smart yourself. Asking someone “What would an optimal player think is the best move?” should produce answers no better than “What do you think is best?”

So what I mean in practice, when I say Harry is allowed to attain his full potential as a rationalist, is that Harry is allowed to solve this problem the way YOU would solve it. If you can tell me exactly how to do something, Harry is allowed to think of it.

But it does not serve as a solution to say, for example, “Harry should persuade Voldemort to let him out of the box” if you can’t yourself figure out how.

The rules on Fanfiction dot Net allow at most one review per chapter. Please submit *ONLY ONE* review of Ch. 113, to submit one suggested solution.

For the best experience, if you have not already been following Internet conversations about recent chapters, I suggest notdoing so, trying to complete this exam on your own, not looking at other reviews, and waiting for Ch. 114 to see how you did.

I wish you all the best of luck, or rather the best of skill.

Ch. 114 will post at 10AM Pacific (6PM UTC) on Tuesday, March 3rd, 2015.

ADDED:

If you have pending exams, then even though the bystander effect is a thing, I expect that the collective effect of ‘everyone with more urgent life issues stays out of the effort’ shifts the probabilities very little (because diminishing marginal returns on more eyes and an already-huge population that is participating).

So if you can’t take the time, then please don’t.Like any author, I enjoy the delicious taste of my readers’ suffering, finer than any chocolate; but I don’t want to *hurt* you.

Likewise, if you hate hate hate this sort of thing, then don’t participate! Other people ARE enjoying it. Just come back in a few days. I shouldn’t even need to point this out.

I remind you again that you have hours to think. Use the Hold Off On Proposing Solutions, Luke.

And really truly, I do mean it, Harry cannot develop any new magical powers or transcend previously stated constraints on them in the next sixty seconds.

Unsurprisingly, this led to a lot of reader submissions. An awful lot.

You can see the fallout on the /r/HPMOR subreddit.If you’re reading this somewhere that the previous text isn’t a link, you can go to http://www.reddit.com/r/HPMORand search for “Help! My evil plan has worked all too well!”