Examine the following statements:
1. All colours are pleasant.
2. Some colours are pleasant.
3. No colour is pleasant.
4. Some colours are not pleasant.
Given that statement 4 is true, what can be definitely concluded?
(a) 1 and 2 are true
(b) 3 is true
(c) 2 is false
(d) 1 is false
Correct option (d) 1 is false
Explanation:
As per statement 4: Some colours are not pleasant. It implies that there is atleast one colour that is not pleasant. It obviously means that statement 1 that states that all colours are pleasant is definitely false.