Book, Paragraph

 1      I, 3 |          neither would some of the Bs be A necessarily. But the
 2      I, 9 |          and since C is one of the Bs, it is clear that for C
 3      I, 10|            possible of none of the Bs: for again we have obtained
 4      I, 11|           C belongs to some of the Bs, A will not belong to some
 5      I, 14|          may belong to none of the Bs, and B to none of the Cs.
 6      I, 17| necessarily belongs to some of the Bs. But this is impossible."
 7      I, 20|           possible for some of the Bs, then A is possible for
 8      I, 20|           possible for some of the Bs. For we have got the first
 9      I, 20|           C, and C for some of the Bs, then A is possible for
10      I, 20|           possible for some of the Bs. Similarly if the proposition
11      I, 21|     possibly belong to some of the Bs. For when one of the premisses
12      I, 28|        observe the identity of the Bs with the Hs.~
13      I, 45|            C, and C to some of the Bs. If A belongs to all C and
14      I, 45|            C, and C to some of the Bs. But if the negative statement
15     II, 2 |           of C, but to none of the Bs, neither let B belong to
16     II, 5 |            C, and A to none of the Bs: we conclude that A belongs
17     II, 5 |           A belongs to none of the Bs (which was previously assumed)
18     II, 7 |       should belong to some of the Bs. In no other way is it possible