Skepticism

n.	1.	An undecided, inquiring state of mind; doubt; uncertainty. That momentary amazement, and irresolution, and confusion, which is the result of skepticism. - Hune.
	2.	(Metaph.) 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.
	3.	(Theol.) 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. Let no . . . secret skepticism lead any one to doubt whether this blessed prospect will be realized. - S. Miller.

Noun	1.	skepticism - doubt about the truth of something Synonyms: disbelief, incredulity, mental rejection
	2.	skepticism - the disbelief in any claims of ultimate knowledge Synonyms: scepticism, agnosticism

Humism, Pyrrhonism, agnosticism, apprehension, caution, cautiousness, concern, diffidence, disinclination to believe, distrustfulness, doubt, doubtfulness, dubiety, dubiousness, guardedness, half-belief, incertitude, inconvincibility, incredulity, leeriness, misdoubt, misgiving, mistrustfulness, qualm, qualmishness, question, resistiveness to belief, scoffing, scruple, scrupulousness, self-doubt, shadow of doubt, skepticalness, suspicion, suspiciousness, total skepticism, tough-mindedness, uncertainty, unconvincibility, uncredulousness, unpersuadability, unpersuasibility, wariness, wonder