Book, Paragraph

 1      I,  17|   unchanged, but the quality of A-D must be changed; so that
 2      I,  17|        that D-B is always true, A-D always false. Such error
 3      I,  17|        is not subordinate to A, A-D will be true, D-B false-A-D
 4      I,  17| unchanged, while the quality of A-D must be converted, and the
 5      I,  17|       if D is subordinate to A, A-D will be true, but D-B false;
 6      I,  17|     subordinate to A, obviously A-D, since it is affirmed, will
 7      I,  25|     other through F and G. Then A-D is known to the same degree
 8      I,  25|       in the second proof), but A-D is better known than and
 9      I,  25|     since A-E is proved through A-D, and the ground is more
10      I,  25|        single negative premiss, A-D. In the further prosyllogisms