Question : Directions: Two statements are given, followed by two conclusions numbered I and II. Assuming the statements to be true, even if they seem to be at variance with commonly known facts, decide which of the conclusions logically follow(s) from the statements.
Statements:
Some classes are theories.
Some theories are lessons.
Conclusions:
I. All classes can never be lessons.
II. All theories being classes is a possibility.
Option 1: Only conclusion I follows
Option 2: Both conclusions I and II follow
Option 3: Only conclusion II follows
Option 4: Neither conclusion I nor II follows
Correct Answer: Only conclusion II follows
Solution : The possible Venn diagram according to the given statement is as follows –
Let's analyse the conclusions –
Conclusion I:
All classes can never be lessons – It is a possibility that the circles representing classes and lessons do not overlap. But this is not definite. Thus, this conclusion does not follow.
Conclusion II:
All theories being classes is a possibility – It is a possibility that the circle representing theories is completely overlapped by the circle representing classes. But this is not definite. Thus, this conclusion follows.
So, the only conclusion II follows. Hence, the third option is correct.
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