Phlosphr As others have said, the description of a ghost is not universal. Their appearance, abilities, behavior, and meaning varies from culture to culture. The Oddysey and the Aenead speak of all the dead being thirsty for blood. The ghosts of Norse legends have no interest in blood whatsoever.
We did have a recent thread on the different ghosts of different cultures. I’ll try to find it when I log back on.
Mangeorge
This is actually like saying ‘Based on a lack of verifiable evidence and the violation of physical laws, pegasi most likely do not exist’.