open loops

In ordinary usage, skepticism

1. an attitude of doubt toward a particular object.
2. the doctrine that true knowledge or knowledge in a particular area is uncertain.
3. the method of suspended judgment.

In philosophy, skepticism refers to:

1. the limitations of knowledge,
2. a method of obtaining knowledge through systematic doubt and continual testing,
3. a method of intellectual caution and suspended judgment,

In classical philosophy, skepticism refers to the teachings of those who said that they "asserted nothing but only opined".

In religion, skepticism refers to "doubt concerning basic religious principles like immortality, providence, and revelation etc.