What is Artificial Presumptions?

Legal Definition
Also called "legal presumptions;" those which derive their force and effect from the law, rather than their natural tendency to produce belief. 3 Starkie, Ev. 1235. Gulick v. Loder, 13 N. J. Law, 72, 23 Am. Dec. 711.
-- Black's Law Dictionary
Legal Definition
Facts presumed in law to exist, regardless of proof. See 13 N. J. L. 68, 23 Am. Dec. 711.
-- Ballentine's Law Dictionary