Authors/Ockham/Summa Logicae/Book III-1/Chapter 50

Latin	English
Cap. 50. De mixtione necessarii et impossibilis	Chapter 50. On the mixture of necessary and impossible propositions.
De mixtione necessarii et impossibilis dicendum est post haec. Et est sciendum quod cum, sicut dictum est prius, quaelibet propositio de impossibili aequivaleat alicui propositioni de necessario, ad sciendum quando mixtio necessarii et impossibilis valet et quando non, oportet scire aequipollentiam propositionis de impossibili et propositionis de necessario, et quando uniformis de necessario valet et quando non. De uniformi dictum est prius de aequipollentia autem inter propositionem de necessario et impossibili dictum est alibi, ideo ad praesens haec de ista mixtione sufficiant.	The mixture of the necessary and the impossible must be discussed later. And it must be known that since, as was said before, any proposition about the impossible is equivalent to some proposition about the necessary, in order to know when the mixture of the necessary and the impossible is valid and when it is not, it is necessary to know the equivalence of the proposition about the impossible and the proposition about the necessary, and when the uniform proposition about the necessary is valid and when it is not. The uniform proposition has been discussed before but the equivalence between the proposition about the necessary and the impossible has been discussed elsewhere, therefore for the present these things about this mixture will suffice.