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-> We have a debate every year over whether 50% predictions are meaningful in this paradigm; feel free to continue it.
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-Someone reading this who trusted Alexander as a general-purpose intellectual authority ("the best of us", the "rationalists") might walk away with the idea that it's an open problem whether 50% binary predictions are meaningful—perhaps reasoning, if the immortal Scott Alexander doesn't know, then who am I to know?
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-But it's not. On this website, [Rafael Harth explains why 50% isn't special](https://www.lesswrong.com/posts/DAc4iuy4D3EiNBt9B/how-to-evaluate-50-predictions). I claim that this should actually be pretty obvious to competent quantitative thinkers, even if it's not obvious to the collective _SSC_/_ACX_ commentariat, and Alexander can't tell which of his commenters are competent quantitative thinkers.