In case anyone else is wondering - Robin is the ex-wife of another prominent linguist, George Lakoff.
Somehow GPT-5 got this badly wrong when I first asked:
Yes — George Lakoff and Robin Lakoff are related. They are siblings.
What a fascinating semantic mistake. Is it possible being long-divorced is more similar to being siblings than we realize?
I would sincerely hope not.
This question may well be the rosetta stone for the cultural divide over AI.
I don't think it means much except you need to enable "web" or searching at least for most models to deal well with facts, and that's probably for the better.
Even a basic search tool + GPT-OSS-20b handles it correctly it seems to me (https://gist.github.com/victorb/de69a8c2169e6a7cc1989592419b...), if I guessed what prompt you used correctly, "Were George Lakoff and Robin Lakoff related?".
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