Definition of ipso facto adverb from the Oxford Advanced Learner's Dictionary

 

ipso facto

 adverb
adverb
BrE BrE//ˌɪpsəʊ ˈfæktəʊ//
 
; NAmE NAmE//ˌɪpsoʊ ˈfæktoʊ//
 
(from Latin, formal)
 
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because of the fact that has been mentioned You cannot assume that a speaker of English is ipso facto qualified to teach English. Word OriginLatin.
See the Oxford Advanced American Dictionary entry: ipso facto