Dave has just come into the kitchen where Mario is.

Mario says, for whatever reason, 'The chains of Mephistopheles have just been thrown off you Dave'

Dave says 'Who? Isosceles?'

Mario, 'No, Mephistopheles, he is a devil figure....' etc.

Dave, 'You're quite well read, aren't you Mario?'

So called man of god has never heard of Mephistopheles! Case closed M'Lud!