validity
  有效性,正確性
  validity
  確實性
  validity
  驗證
  Va·lid·i·ty n.
  1. The quality or state of being valid; strength; force; especially, power to convince; justness; soundness; as, the validity of an argument or proof; the validity of an objection.
  2. Law Legal strength, force, or authority; that quality of a thing which renders it supportable in law, or equity; as, the validity of a will; the validity of a contract, claim, or title.
  3. Value. [Obs.] “Rich validity.”
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  validity
       n 1: the quality of being logically valid [syn: cogency, rigor,
             rigour]
       2: the quality of having legal force or effectiveness [syn: validness]