Yeah, this is basically the route I'd do. Except I added one more ingredient. Here, I'll just quote my review.
Ramble to Voldemort about how you have a better knowledge of decision-making systems and scientific research, and about how if you do destroy the world, it won't be because you have some world-destroying-property, it will be a result of bad actions - actions that Voldemort, who is starting to learn muggle science, might take just as easily. Indeed this seems likely, since you make such similar decisions, and he may find the prophecy talking about him instead.
If he really wants to stop the prophecy, the way is not to very thoroughly kill one child, the way is to understand the causal path that leads to bad things happening, no matter who does it, and divert it. For this, it would be beneficial if he had you, Harry, alive and well. In fact, you have several ideas already, which for obvious bargaining reasons you will not mention. Since this is fairly honest, you can even say something in parseltongue about how this increases his chances of survival, playing on Tom Riddle's overriding fear of death.
Then, when he's distracted considering this, kick him in the grill.
Nice. I like it.
I expanded my previous post in a full solution (very long) with a pretty thorough line of reasoning. In the end, I convinced myself that Voldemort is not acting in his self-interest by killing Harry and that he's dangerously overconfident in his understanding of the Prophecy and his ability to avert it. Here are the relevant excerpts from my solution:
...Tell Voldie that original prophecy ("born as the seventh month dies...") has not yet been fulfilled, and argue that this calls for rethinking killing Harry because attempting to ki
This is a new thread to discuss Eliezer Yudkowsky’s Harry Potter and the Methods of Rationality and anything related to it. This thread is intended for discussing chapter 113.
There is 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.)
IMPORTANT -- From the end of chapter 113: