Ex Facto
A Dictionary of Law · Henry Campbell Black · 1891
A Dictionary of Law
From or in consequence of a fact or action; actually. Usually applied to an unlawful or tortious act as the foundation of a title, etc. Sometimes used as equivalentto “de facto.” Bract. fol.
172.
Ex facto jus oritur
The law arises out of the fact. Broom, Max. 102. <A rule of law continues in abstraction and theory, until an act is done on which it can attach and assume a3 ib were a budy and shape.
LBesi, Ev. Introd. § 1.