ip ‧ so fac ‧ to /ˌɪpsəʊ ˈfæktəʊ $ -soʊ ˈfæktoʊ/ BrE AmE adverb formal
[ Date: 1500-1600 ; Language: Latin ; Origin: 'by the fact itself' ]
used to show that something is known from or proved by the facts
ip ‧ so fac ‧ to /ˌɪpsəʊ ˈfæktəʊ $ -soʊ ˈfæktoʊ/ BrE AmE adverb formal
[ Date: 1500-1600 ; Language: Latin ; Origin: 'by the fact itself' ]
used to show that something is known from or proved by the facts
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012