You're welcome, and thank you too.

I agree with all that. The edge cases are tricky and there's no easy answer.

A painter flicking or splashing paint on a canvas presumably makes something with copyright protection.

Does an accidentally statically impossible basically impossible to tell apart version accidentally made by someone flicking and splashing their own paint infringe it? I'd hope not but can't really argue for a rule on it that doesn't involve believing stated goals/mind reading.

Guess not a thing us mortals/non-legal professionals can ever answer.