dangermows
Striker
Poor edit. As a proof, how about the laws of thermodynamics? Energy can not be created or destroyed only converted from one form to another. My brain is currently using electrical energy which it has obtained by digesting my breakfast. Same as the movement of my fingers. It has all been fuelled in some way.
Ghosts/spirits/afterlife are not consuming energy, therefore they can not expend it. As well as not having a physical brain, any afterlife must live in a zero energy state, which makes all thought and movement impossible. Here is a proof it can’t exist but no proof has ever been given that can explain how ghosts can exist in our physical universe.
Ghosts are simply other people from other universes when multiverses occasionally overlap.