Sometimes, even in the face of hard, very convincing evidence, the most difficult part of dealing with EVP and the paranormal is self-doubt. Doubt usually sets in quickly and in a matter of seconds can undo hours and days of comprehensive analysis and substantiated evidence. Doubt has a place, of course, but just like its opposite - belief, it can get in the way and easily obscure the truth. We should always feel free to question evidence at any time, but this kind of doubt, emotionally driven, should not be confused with skepticism.