By this term is understood that period of life from the birth till the arrival of twenty-one years. In another sense it means under the proper age to be of ability to do a particular thing; as, when non age is applied to one under the age of fourteen, who is unable to marry. NON ASSUMPSIT, pleading. The general issue in trespass on the case, in the species of assumpsit. Its form is, And the said C D, by E F, his attorney, comes and defends the wrong and injury, when, and says, that he did not undertake or promise in manner and form as the said A B, hath above complained. And of this he puts himself upon the country. 2. Under this plea almost every matter may be given in evidence, on the ground, it is said, that as the action is founded on the contract, and the injury is the non, performance of it, evidence which disaffirms the obligation of the contract, at the time when the action was commenced, goes to the gist of the action.