Ipse Dixit
The Cyclopedic Law Dictionary · Walter A. Shumaker and George Foster Longsdorf; ed. James C. Cahill · 1922
The Cyclopedic Law Dictionary
He himself said it
Applied as a substantive to the unsupported assertion of one person. IPSISSIMIS VERBIS (Lat.) In the identical words'; opposed to "substantially."
7 How. (U. S.) 719; 5 Ohio St. 346.
IPSO FACTO (Lat.) By the fact itself; by the mere fact. IPSO JURE (Lat.) By the operation of law; by mere law.