Infirmative Fact
A Dictionary of Law · Henry Campbell Black · 1891
A Dictionary of Law
In the law of evidence. A fact set up, proved, or even supposed, in opposition to the criminative facts of a case, the tendency of which is to weaken the force of the inference of guilt deducible from them.
8 Benth. Jud, Ev, 14; Best, Pres. § 217, et seq.