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Noun: doubtfulness
  1. The state of being unsure of something
    - doubt, uncertainty, incertitude, dubiety, dubiousness
     
  2. Uncertainty about the truth or factuality or existence of something
    "the doubtfulness of his claim"
    - doubt, dubiousness, question

Derived forms: doubtfulnesses

See also: doubtful

Type of: cognitive state, precariousness, state of mind, uncertainness, uncertainty