The quality of being skeptical.

What does Skepticality mean?

or scep·ti·cal

inclined to skepticism; having an attitude of doubt: a skeptical young woman who will question whatever you say. ... denying or questioning the tenets of a religion: a skeptical approach to the nature of miracles.

What do you call a person who doubts?

skeptic. / (ˈskɛptɪk) /