I don’t see it in my database, and it’s never been played on Lichess, even in bullet games.

Which, of course, is not evidence that a superhuman wouldn't consider such a move. AlphaGo also made unusual moves that looked like mistakes, but turned out to be insights.

Apologies, misread the parent comment!

Ask any GM.

How would a GM (human) know what would be played by a superhuman?