|valid suomeksi||kelpaava en, pätevä en, voimassa oleva en, voimassaoleva en|
: I will believe him as soon as he offers a valid answer.
: A valid format for the date is MM/DD/YY.
: Do not drive without a valid license.
: An argument is [[valid]] if and only if the set consisting of both (1) all of its premises and (2) the contradictory of its conclusion is inconsistent.