I am somewhere in the middle..I don't really believe in UFOs and aliens, but I don't dispel it too..
IF i every encounter UFOs and aliens, THEN i will believe..

Same goes for ghosts..my ONLY experience is the feeling of goosebumps at a particular storey of a hotel in Shanghai, but never first-hand encounters..until I encounter ghosts in first-hand, then I will believe in ghosts..
