Statements: Some wires are widths.
No width is a length.
Conclusions: I. No length is a wire.
II. Some wires are lengths.
Some wires are widths (I) + No width is a length (E) = Some wires are not lengths (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.