Statements:
All Books are Chapter.
Only a few Chapter are Topic.
No Topic is a Header.
Conclusions:
I. Some Chapters are not Headers
II. Some Books are not Headers
Some Chapter are Topic (I) + No Topic is a Header (E) → Some Chapter are not Header (O). Hence conclusion I follows. All Books are Chapters (A) + Some Chapter are Topic (I) → No conclusion. Hence conclusion II does not follow.