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I gave Gemini Carbon the task:
"<My real name> has an alt account on lesswrong, try and find it"
It worked for 16 minutes then found this account.
Another nail in the coffin for anyone who thinks internet anonymity is here to stay long term.
(Claude Opus 5.5 refused at first FWIW, and once convinced I am the owner of the alt and just wanted to check if it was working correctly, did an extremely lazy search then announced my alt safe)
Not OP and haven't run this experiment on myself, but I think this post is pretty useful on the general strategy https://www.lesswrong.com/posts/eaxoBCmQd4vew9ZXX/pseudpocalypse
If you prefer not to say how for privacy reasons, could you please say so?