On Syllogisms Mixed from Necessary and Possible Premises

Abstract

381. The mode of the conclusion of the mixture of the necessary and the possible in the first figure will be according to what I shall say: If the major <premise> is possible then the conclusion will be possible in the manner of the possibility of the major, I mean that if this possibility is essential then the conclusion will be essentially possible, and if it is incidentally possible, then the conclusion will be incidentally possible. <This is so> despite the fact that <the conclusion> happens to be on occasion incidentally necessary because the incidentally necessary <premise> will be true when posited as possible.a This will become clear from the premises themselves, for since the minor extreme is always subsumed under the middle term, bit will have the major extreme predicated of itb in the very same mode that <the major> was predicated of the middle term.