Which of the following propositions are so related that they cannot both be…
2023
Which of the following propositions are so related that they cannot both be false although they may both be true, as per square of opposition?
A. Some apes are monkeys.
B. All apes are monkeys.
C. Some apes are not monkeys.
D. No apes are monkeys.
Choose the correct answer from the options given below:
- A.
B and D only
- B.
A and B only
- C.
A and C only
- D.
C and D only
Attempted by 5 students.
Show answer & explanation
Correct answer: C
In the Square of Opposition, propositions that cannot both be false but may both be true are called subcontraries. This relationship exists between the Particular Affirmative (I) and Particular Negative (O) propositions. Proposition A ('Some apes are monkeys') is an I statement, and Proposition C ('Some apes are not monkeys') is an O statement. Therefore, A and C form the subcontrary pair.