ipso facto
adverb formal uk/ˌɪp.səʊ ˈfæk.təʊ/ us/ˌɪp.soʊ ˈfæk.toʊ/
根据已知事实
used to say that it is reasonable to state or believe something based on facts that are already known
You admit you fired the gun and we now know that the shot killed the victim so you are, ipso facto, responsible for his death. 你承认开过枪，而现在我们知道这一枪杀死了受害人，因此根据事实你应对他的死负责。