Ghosts and mental health

Adding further to scientific evidence for experiences of ghosts being not ghosts but having other causes from outside the person claiming to experience the ghost or inside their head. Even intelligent people can be fooled into thinking that they have met and spoken to people who cannot be caught on camera, seen by others, nor found next day in broad daylight.

Apparently ghost companions are a real, recognised danger when people grow light-headed on mountains and imagine phantom friends or enemies.

Here is an example of a fit, resourceful man, who in the night has a conversation with a man in his tent who is not there next day.

dailymail.co.uk/news/article-2745714/My-battle-death-angry-hungry-polar-bear.html