Roman Catholic Archdiocese of Tunis to close down all the Catholic churches in the country, forced the Holy See to accept an agreement of the type known as a modus vivendi, a term that literally means "a way of living". This particular agreement was unofficially described as instead a "modus non moriendi" ("a way of not dying"). By it, all but 5 of the country's more than 70 churches were handed over to the state, including what had been the cathedral of the archdiocese, while the state, for its part, promised that the buildings would be put only to use of public interest consonant with
Modus ponens of as "double "modus ponens"." The history of "modus ponens" goes back to antiquity. The first to explicitly describe the argument form "modus ponens" was Theophrastus. The "modus ponens" rule may be written in sequent notation as where "P", "Q" and "P" → "Q" are statements (or propositions) in a formal language and ⊢ is a metalogical symbol meaning that "Q" is a syntactic consequence of "P" and "P" → "Q" in some logical system. The argument form has two premises (hypothesis). The first premise is the "if–then" or conditional claim, namely that "P" implies "Q". The second premise is