Depends a little on how you define ghosts... do I believe that the dead have spirits that linger on the physical plane to haunt the living? No.
Do I believe that there are interesting phenomena that people attribute to ghosts that aren't explained to my satisfaction? Sure.
Well that second definition wouldn't even be a ghost... =P
But I was talking about your first definition, more or less. And it also depends on what you mean by spirit. Does a spirit have all the same memories as you? Does it have your personality? If that's the case, would you be a different person if all your memories were erased? I mean, that's sort of like simulating death isn't it? If all of your memories are erased can you say that you're still the same person as before? If yes, then a spirit would be the ultimate and most certain embodiment of you. Not your body or your memories. And going one step further, if that were also true then your actions and your sins would be irrelevant, since they would just be a product of your memories. Another step still, if that were true then a spirit could not be said to be distinguishable from another since we as humans are unique based on our memories. And if that were true then all spirits would have to be one...meaning we're all one entity experiencing itself simultaneously.
That's a lot of if's but that's pretty much my take on it at the moment.


