If a
belief cannot be
proven or
disproven, then there is no
virtue in holding that belief.
Hence, the articles of faith in most religions are by necessity things which cannot be tested or refuted: your Soul goes to heaven when you die; the fossils were put there by God 10,000 years ago; Allah spoke through Mohammed; and so on.
Some so-called psychics who fail James Randi's tests claim that scientific observation stops their powers from working...