I don't believe in ghosts or the paranormal at all. The only evidence people give for the paranormal are anecdotes, and anecdotes aren't evidence. There's simply no reliable, scientific evidence to support the existence of the paranormal. Even if I saw a "ghost," I still wouldn't believe it because the idea of ghosts or anything paranormal for that matter is so ludicrous to me and I know my own anecdote isn't fact. Even if I were with a thousand people and every single one of us all saw what appeared to be ghosts, I'd still rationalize it as a trick or an illusion. If there were cold hard, comprehensive scientific evidence that ghosts were real, I'd change my stance.

Like Xanthe, I don't believe in the concept of a spirit/soul. I believe that when you die, it's just lights out - you don't become a spook or anything. However, the paranormal is something that can never really be disproven. You can't really claim that stuff like this doesn't exist because there's no way to scientifically prove it unless it downright conflicts with scientific fact. For example, you could claim there was an invisible, undetectable pig on the moon and I couldn't disprove that. But if you said that invisible pig turns off Earth's gravity every night at 8:00 pm until 6:00 am, I could say you're wrong, because gravity, obviously, doesn't turn off at 8:00 pm and resume at 6:00 am.

I'm not telling anyone they're wrong because I can't! People will always have varying beliefs on stuff that can't be/hasn't been unproven. Like, people even choose not to believe stuff that can be and has been proven...But I, personally, don't believe in anything paranormal.