skepticism

A doubting or questioning attitude or state of mind; dubiety. synonym: uncertainty.

The ancient school of Pyrrho of Elis that stressed the uncertainty of our beliefs in order to oppose dogmatism.

The doctrine that absolute knowledge is impossible, either in a particular domain or in general.

A methodology based on an assumption of doubt with the aim of acquiring approximate or relative certainty.

Doubt or disbelief of religious tenets.

The entertaining of mistrust, doubt, or disbelief; especially, the reasoning of one who doubts the possibility of knowledge of reality; the systematic doubt which characterizes a philosophical skeptic; specifically, doubt or disbelief of the fundamental doctrines of the Christian religion.

An undecided, inquiring state of mind; doubt; uncertainty.

The doctrine that no fact or principle can be certainly known; the tenet that all knowledge is uncertain; Pyrrohonism; universal doubt; the position that no fact or truth, however worthy of confidence, can be established on philosophical grounds; critical investigation or inquiry, as opposed to the positive assumption or assertion of certain principles.

A doubting of the truth of revelation, or a denial of the divine origin of the Christian religion, or of the being, perfections, or truth of God.