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Rationality: from AI to Zombies really changed my way of thinking in many ways. It's very hard to describe it or sell it in a few sentences. Partly because it covers so many different things. And partly because I read it so long ago and have already absorbed many of the good ideas in it. They no longer seem exciting and new, and just feel obvious. But they certainly weren't when I first read it.

I constantly see places where an idea from the book is relevant and I want to make people read a chapter of it. Examples include insights into evolution, artificial intelligence, morality, and philosophy. There's a short section on how people tend to argue about the definitions of words and how unproductive this is, that I always find relevant. There's a lot of discussion on various human biases and how they affect our thinking. My favorite is hindsight bias, where people overestimate how obvious events were after they know the outcome. Or the planning fallacy, which explains why so many big projects fail or go over budget.

The author's writing style is somewhat polarizing. Some people love it and some people hate it, with fewer in between. He definitely has a lot of controversial ideas. Although in the 10 years since he started writing, a lot of his controversial opinions on AI have gone mainstream and become a lot more accepted than they were back then.



I'm audiobook-ing "Harry Potter And The Methods of Rationality" by the same author.

It presents some of the ideas from "Rationality" but from the point of view of Harry who is portrayed as a rationalist. In-fact the first chapter is titled "A Day of Very Low Probability" where Harry tries to think probabilistically about the new magical world he is being introduced to when he is still living with Aunt Petunia.

I recommend the audiobook because the voice actors have done such a good job with it. I can't help smiling at Harry's pre-pubescent ten year old voice.

Find it here : http://hpmor.com


One hundred and twenty two chapters :o


So worth it. If you read it, you'll wish there were more.


Rationality is good, but I found Harry Potter and the Methods of Rationality to be a much more pleasant read about the same topics by the same author.

Both books suffer from the same problem, the lack of an editor. They could be half the size and it would make them a much more convincing and entertaining read.


So there isn't much new stuff in Rationality that one wouldn't already find in HPMOR, for those who have read the latter?


Rationality is much more technical and precise than HPMOR, and covers topics that you couldn't easily cover in fiction. I've read both, and would recommend each even if you've read the other.


There is more in rationality, but nothing you'd terribly miss, at least IMHO.


The HP books also suffers a bit from being written one chapter at a time. But at the same time, it's an interesting concept seeing a story evolve that way. I found some of the first chapters a bit long-winded, but after that I think the book found its direction.


Yea, I agree. Yudkowski found his voice starting around chapter 20. The initial chapters could use a good rewriting.


Arguing or getting heated over semantics has always been an irksome detail of human emotion / behavior for me.

Guess I'll give this book a read.




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