That he was the greatest 100m runner of his generation was incontestable.
incapable of being contested or disputed not open to question; obviously true; "undeniable guilt"; "indisputable evidence of a witness
Not contestable; not to be disputed; that cannot be called in question or controverted; incontrovertible; indisputable; as, incontestable evidence, truth, or facts
In United States trademark law, having been registered as a trademark for more than five consecutive years without a challenge, and therefore conclusively presumed not to cause confusion with any other trademark, and to have acquired distinctiveness
In United States trademark law, having been registered as a trademark for more than five consecutive years without a challenge, and therefore conclusively presumed not to cause confusion with any other trademark