One of the great reasons I love Town of Salem (besides the Rap song by Minx/Dave) is how easy it is to be absolutely certain beyond any doubt that you know with great certainty who is a where role is typically Serial Killer or Godfather, sometimes Jester or Executioner, maybe Witch.
I have played for a long time, and every-time a person gives absolutely perfect evidence for what they know, I can easily refute them using game mechanics.
An example, Once I was serial killer, 2 people visited me, 1 was prostitute and I don't recall the other. In a strange twist the other person whose role I forget, became targeted as the Serial Killer and was lynched. I survived to win the round.
This made me wonder, every rules or mechanic seems to be designed to prove a person is A but really only proves they are |A| by which is meant alignment can't be determined.
Is there any truth to this? Is it at all possible to prove concretely what a persons role is. Noting, in over 2k games I've played, I've never seen it happen with the exception of pure luck.