

Logical Deduction - Verbal and Reasoning
Q1: Statements: All needles are threads. All threads are boxes. All trees are boxes.
Conclusions:
A
None follows
B
Only either I or IV follows
C Only either I or IV, and II follow
D
Only III follows
E
Only either I or IV, and III follow
ANS:E - Only either I or IV, and III follow Explanation: All needles are threads. All threads are boxes. Since both the premises are universal and affirmative, the conclusion must be universal affirmative (A-type) and should not contain the middle term. So, it follows that 'All needles are boxes'. III is the converse of this conclusion and so it holds. All threads are boxes. All trees are boxes. Since the middle term 'boxes' is not distributed even once in the premises, no definite conclusion follows. All needles are boxes. All trees are boxes. Again, since the middle term 'boxes' is not distributed even once in the premises, no definite conclusion can be drawn. However, I and IV involve the extreme terms of these two statements and form a complementary pair. Thus, either I or IV follows. |


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