Ah, the basic assumption is that the devil is a liar, so, why would anyone "sign" anything with a liar ? The devil got his soul just by signing the "pact" I suppose, this is natural selection and supernatural level Yes, yes, I know that all could be just fake and so on, but, it could also be true Aftherlife cannot be proven to exist or not to exist, it is a bet, that may be won or not