are not subaltern, for animal concurs both with horse and man, but horse with no man; if therefore A is assumed present with every B, and B with every C, the conclusion will be true, though the whole proposition B C is false. It will be the same, if the proposition A B is negative. For it will happen that A will be neither with any B, nor with any C, and that B is with no C, as genus to those species which are from another genus, for animal neither concurs with music nor with medicine, nor music with medicine: if then A is assumed present with no B, but B with every C, the conclusion will be true. Now if the proposition B C is not wholly but partially false, even thus the conclusion will be true. For nothing prevents A from concurring with the whole of B, and the whole of C, and B with a certain C, as genus with species and difference, thus animal is with every man and with every pedestrian, but man concurs with something, and not with every thing pedestrian: if then A is assumed present with every B, and B with every C, A will also be present with every C, which will be true.
