I am not sure I am qualified to comment on this…but I can testify as to TWO insane individuals.
If you have to debate insanity, then I suspect you are trying to self-diagnose.
I personally find most everyone to be insane in their own way, demon or human. Again, I only know of one person who is 100% certifiably sane. It’s also the only person whose secrets and motivations I have even a remote glimpse of.