Somehow GPT-5 got this badly wrong when I first asked:
Yes — George Lakoff and Robin Lakoff are related. They are siblings.
Er, no. They were married once and divorced 50 years ago according to their Wikipedia pages.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?".
drankl•5mo ago