a. [ Cf. F. contestable. ] Capable of being contested; debatable. [ 1913 Webster ]
a. [ Pref. in- not + contestable: cf. F. incontestable. ] Not contestable; not to be disputed; that cannot be called in question or controverted; incontrovertible; indisputable;
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a. Incontestable. [ 1913 Webster ]