Question

Identify the set of three statements that are logically related.
A. No plane is a chain.
B. All manes are chains.
C. No mane is a plane.
D. Some manes are not planes.
E. Some planes are manes.
F. Some chains are not planes.

• A. ACD
• B. ADF
• C. ABC
• D. CDF

Hint:

If "No X is Y" is true, then "Some X are not Y" must also be true — this is a particular case derived from a universal negative.

Answer 1

The Correct Option is A

A — "No plane is a chain." — This is a universal negative statement relating planes and chains.
C — "No mane is a plane." — This is another universal negative, connecting manes and planes.
D — "Some manes are not planes." — This is a particular negative statement that follows from C, because if no mane is a plane, then certainly some manes are not planes.
Thus, A, C, and D are logically related through consistent negative categorical relationships.