In twenty years, the best evidence will suggest that sperm counts are substantially declining across most of the world
25
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2043
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bought Ṁ25 of NO here and Ṁ25 of YES on https://manifold.markets/ScottAlexander/in-twenty-years-will-the-best-evide since this seems either equivalent or very slightly weaker.
Not a pure arbitrage, since there's still risk that Noah and Scott will dissagree.
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