Page:O. F. Owen's Organon of Aristotle Vol. 1 (1853).djvu/207

 animate, yet man consists with something pedestrian. If then A and B are assumed present with every C, the propositions indeed will be wholly false, but the conclusion true. Likewise also if one premise is negative, but the other affirmative, for B possibly is present with no C but A with every C, and A may not be with a certain B. Thus blackness consists with no swan, but animal with every swan, and animal is not present with every thing black. Hence, if B is assumed present with every C, but A with no C, A will not be present with a certain B, and the conclusion will be true, but the premises false. If, however, each is partly false, there will be a true conclusion, for nothing prevents A and B being present with a certain C, and A with a certain B, as whiteness and beauty are consistent with a certain animal, and whiteness is with something beautiful, if then it is laid down that A and B are with every C, the premises will indeed be partly false, but the conclusion true. Likewise if A C is taken as negative, for nothing prevents A not consisting with a certain C, but B consisting with