Page:O. F. Owen's Organon of Aristotle Vol. 1 (1853).djvu/203

 Again, if the one is wholly false, but the other wholly true, since nothing prevents A from being with every B and with every C, but B with no C, as genus with species not subaltern, for animal is with every horse and with every man, and no man is a horse. If then it is assumed to be with every individual of the one, but with none of the other, the one proposition will be wholly false, but the other wholly true, and the conclusion will be true to whichever proposition the negative is added. Also if the one is partly false, but the other wholly true, for A may possibly be with a certain B and with every C, but B with no C, as animal is with something white, but with every crow, and whiteness with no crow. If then A is assumed to be present with no B, but with the whole of C, the proposition A B will be partly false, but A C wholly true, and the conclusion will be true. Likewise when the negative is transposed, since the demonstration is by the