Statements: Some papers are copies.
No copy is a diary.
Some diary are cardboard.
Conclusions:I. No diary is papers.
II. Some papers are diary.
Some papers are copies (I) + No copy is a diaries (E) = Some papers are not diaries (O). Hence, neither conclusion I nor II will follow. However, Conclusion I and II make a complementary pair, hence, either conclusion I or II will follow. ALTERNATE METHOD: All possible cases:
In case A, no paper is a diary and in case B & C some papers are diary. Thus, either of them is true.