someone inclined to doubt accepted opinions scepticism systematic doubt. See also: PS See also: pyrrhonism

A person inclined to discount the alleged reality of the "paranormal" and to challenge "parapsychological" research methods and conclusions by seeking rational or conventional scientific explanations for anomalous phenomena.

someone who habitually doubts accepted beliefs

See Skeptic, Skeptical, Skepticism, etc.

a person who when he sees the handwriting on the wall, claims it's a forgery

Sceptic - Polish death metal band from Kraków