I mean, this is seriously moving the goalpost, but let's play along. I tear off the Scooby-Doo mask, and the person is now exposed as being a different person.

I mean, this is seriously moving the goalpost, but let's play along. I tear off the Scooby-Doo mask, and the person is now exposed as being a different person. You hunt me down (somehow? magically? nothing in PK infrastructure allows this, but let's say you do it) and I say "yes, that's my PK, and yes, I signed that" but how can you then verify I didn't take it from chatGPT and sign it?