

Logical Deduction - Verbal and Reasoning
Q1: Statements: Some pearls are stones. Some stones are diamonds. No diamond is a gem.
Conclusions:
A
Only I and II follow
B
Only III and IV follow
C Only either I or IV and either II or III follow
D Only III and either I or IV follow
E None of these
ANS:D - Only III and either I or IV follow Explanation: III is the converse of the third premise and so it holds. Some pearls are stones. Some stones are diamonds. Since both the premises are particular, no definite conclusion follows. Some stones are diamonds. No diamond is a gem. Since one premise is particular and the other negative, the conclusion must be particular negative and should not contain the middle term. So, it follows that 'Some stones are not gems'. However, I and IV involve the extreme terms of the three premises and form a complementary pair, Thus, either I or IV follows. |


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