Replace "Anubis" with "Nasus"

True. This guy knows what he is talking about.

Some house rules allow it. Usually making nat 1 an automatic failure to balance it out.

{quoted}

Skill Checks don't auto succeed on natural 20s as far as I know.

It's mostly down to how the DM plays it, as there's no cut-and-dry ruling on it. (Which is a good thing, IMHO) Most of the time, my DM says that a natural 20 is an automatic success, because he won't let us make the check to begin with if it's an impossible task. (Like trying to lie to the God of Truths or something outlandish) Likewise, he automatically fails people for rolling a natural 1 because if the task was so easy to accomplish that a natural 1 would still succeed, he wouldn't make you roll for it.

Once again, though, mostly house-ruling. Playing it "by the books", so to speak, still means it comes down to what tabletop edition you're playing.