Scott Alexander's Contra Grant post states "My research suggests no average gender difference in ability".

This claim is about what the post says. True: Scott Alexander's post 'Contra Grant' (Feb 2021, Astral Codex Ten, about Adam Grant), as published at the time, contains the sentence 'My research suggests no average gender difference in ability' word for word or nearly so. Mostly true: the post has the sentence with small wording changes that keep its meaning. Also mostly true if the sentence is there but the post quotes it from Grant or someone else rather than stating it in Scott's own voice. Mixed: the post says something similar but clearly weaker or different in substance. Mostly false: a sentence like this appears in a different post or source, not in 'Contra Grant'. False: the text of 'Contra Grant' is available and contains no such statement, either quoted or in Scott's voice.

Set before the research began.

1. E1 Bi-weekly Rational Feed — LessWrong LessWrong · 8 August 2017

   “Hyde found moderate or large gender differences in aggressiveness, horniness, language abilities, mechanical abilities, visuospatial skills, mechanical ability, tendermindness, assertiveness, comfort with body, various physical abilities, and computer skills.”

The only evidence, E3, is a 2017 LessWrong link roundup summarising Janet Hyde's findings on gender differences. It does not quote or describe the February 2021 'Contra Grant' post. Because no evidence shows the text of 'Contra Grant', there is no way to tell whether the post contains the quoted sentence, either quoted from someone else or in Scott Alexander's own voice.