Book, Paragraph

 1      I, 5 |       belong to some O. For if N belonged to all O, but M to no N,
 2      I, 7 |      belongs to some B: for if A belonged to no B, and B belongs to
 3      I, 7 |     belongs to some C. For if it belonged to no C, and belongs to
 4      I, 7 |      belong to some C: for if it belonged to all C, and belongs to
 5      I, 28|          identical with H, and H belonged to none of the Es. If D
 6      I, 29|      belongs to some E: for if A belonged to none of the Es, and E
 7      I, 45|          belong to some B: but A belonged to all B: so that the third
 8     II, 2 | conclusion should be true: for A belonged to none of the Cs, since
 9     II, 2 |          none of the Cs, since A belonged to nothing to which B belonged,
10     II, 2 |   belonged to nothing to which B belonged, and B belonged to all C.
11     II, 2 |          which B belonged, and B belonged to all C. Similarly there
12     II, 8 |          the original premiss it belonged to no B.~If the conclusion
13     II, 12|        some B. But originally it belonged to all B, consequently the
14     II, 22|       will C: for ex hypothesi B belonged to all C. And if C is convertible