Scott Alexander gave an 80% probability that Democrats would take control of the US House in the 2018 midterms.
Unresolvable The public record could not settle it.
Prediction: Statements about events outside the person's control, checked once they fell due: did they come true?
What would count as true or false
A factual claim about what Scott Alexander published in early 2018. True: a 2018 predictions post of his lists 'Democrats take control of the House in midterms' at 80%. Mostly true: 80% is given for an essentially identical proposition, or the post's date differs slightly from January. Mostly false: the prediction appears but at a different probability. False: no such prediction appears. The actual election result is not part of the test.
Set before the research began.
Evidence (3)
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E1 Predictions For 2018 Slate Star Codex · 6 February 2018 Own record
“These were written a few days ago; a few already seem obsolete.”
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E2 Mantic Monday: Grading My Trump Predictions Astral Codex Ten (Scott Alexander) · 19 April 2021 Own record
“This is my dump for all my other yearly prediction threads.”
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E3 My Predictions for 2018 (& a Template for Yours) — LessWrong LessWrong (post by Zachary Jacobi) · 2 January 2018
“I originally made predictions after I was inspired by the yearly predictions on Slate Star Codex. Thanks Scott!”
Reasoning
E2 confirms that Scott Alexander published a "Predictions For 2018" post on Slate Star Codex on 2018-02-06, written a few days before. However, the quoted text does not include the House-control prediction or any probability. E4 and E5 only say that his yearly prediction posts exist. None of the quoted evidence shows the 80% figure, so the criteria cannot be applied.
Cite this claim
Scott Alexander, “Scott Alexander gave an 80% probability that Democrats would take control of the US House in the 2018 midterms.” (said January 2018). Verdict: unresolvable. Reliability API, claim c_9306f469f657, method 0.1.0+8bea457b, dataset release v1.1.2. https://epistacklabs.com/claims/c_9306f469f657
This claim is in dataset release v1.1.2, with the same verdict.
Reply to this claim
More prediction claims by Scott Alexander
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Mixed
“Also, I predict we see a lot more of Ted Cruz than people are expecting.”
Scott Alexander predicts that people will see a lot more of Ted Cruz than they expect.
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Mostly true
“The crisis of the Republican Party will turn out to have been overblown.”
The crisis of the Republican Party will turn out to have been overblown.
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Resolved true
“Mueller does not indict Trump: 70%”
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Resolved true
“Donald Trump remains president at end of year: 95%”
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Resolved true
“The European Union will not collapse.”
Verdicts are made automatically; how verdicts are made.