Definition of Evidentiary Fact
Those facts which are necessary for determination of the ultimate facts; they are the premises upon which conclusions of ultimate facts are based. Womack v. Industrial Comm., 168 Colo. 364, 451 P.2d 761, 764. Facts which furnish evidence of existence of some other fact.
That's the definition of Evidentiary Fact in Black's Law Dictionary 6th Edition. Courtesy of Cekhukum.com.