Paper 1 · Teaching Aptitude
UGC NET December 2023 (11.12.2023) Shift-I
Which of the following statements are so related that if one of them is false, the other must be true, even though both of them can be true? Choose the correct answer from the options given below.
- 1. Some cars are e-vehicles
- 2. Some cars are not e-vehicles
- 3. No cars are e-vehicles
- 4. All cars are e-vehicles
A1 and 2 only ✓ Correct
B2 and 3 only
C1 and 3 only
D3 and 4 only
Correct answer: (A) 1 and 2 only — Some cars are e-vehicles and some cars are not e-vehicles are sub-contraries, so the answer is 1 and 2.
Explanation
★Some cars are e-vehicles and some cars are not e-vehicles are sub-contraries, so the answer is 1 and 2.
★Sub-contrary statements cannot both be false, though both can be true.
★Some cars are e-vehicles is the particular affirmative, type I.
★Some cars are not e-vehicles is the particular negative, type O.
★Type I and type O are sub-contraries of each other.
★So if one is false the other must be true, though both can be true together, giving 1 and 2.
Want more like this? Create a free account to practise a full test, track your progress, and get spaced-repetition review.
Shared by Mcqkart · via Mcqkart.in