Pyrrho of Elis

Skepticism has many definitions. Generally it refers to any questioning attitude towards knowledge, facts, or opinions / beliefs stated as facts. It doubts those claims which are taken for granted elsewhere.

The word may characterize a position on a single matter, as in the case of religious skepticism. This is “doubt concerning basic religious principles (such as immortality, providence, and revelation).

Philosophical skepticism is an overall approach that requires all information to be well supported by evidence. Skeptics may even doubt the reliability of their own senses.

Classical philosophical skepticism derives from a school who “asserted nothing”.

A scientific skeptic is one who questions beliefs on the basis of scientific understanding. Most scientists, test the reliability of such claims by subjecting them to a systematic investigation using scientific methods.

As a result, many claims are considered “pseudo-science” if they are found to improperly apply or ignore the fundamental aspects of the scientific method.

Scientific skepticism does not address all religious beliefs. Most religious beliefs are beyond perceivable observation. They are outside the realm of systematic test-ability.