Logical Deduction ( 6 to 10 )

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Questions:

6. Statement

A)    No lady is poor. All ladies are rich.

B)    Conclusion

C)    No poor lady is rich.

D)    No rich lady is poor.

View Answer

Answer: option (D)

Explanation:

As one premise is negative so, the conclusion also must be negative. Thus, it follows ‘Some ladies are not rich’. Thus neither I nor II follows.

 

7. Statement

A)    All butterflies are blue in color. Some butterflies are big.

B)    Conclusion

C)    All big butterflies are blue in color.

D)    All small butterflies are not blue in color.

View Answer

Answer: option (A)

Explanation:

As in the given statement one premise is particular so, the conclusion must be particular and should not contain the middle term.  So, it follows that ‘Some big things are blue in color’. Therefore, ‘I’ is a cumulative result of this conclusion and the first premise. Thus, only I hold.

 

8. Statement

A)    All actors are singers. All producers are actors.

B)    Conclusion

C)    All producers are singers.

D)    Some actors are producers.

View Answer

Answer: option (D)


Explanation:

As both the premises are affirmative and universal so, the conclusion must be universal affirmative and should not contain the middle term. So, ‘I’ follows and ‘II’ conclusion is the converse of the second premise and so it holds. So, the conclusion is it follows both.

 

9. Statement

A)    All forests are lions. Some lions are elephants.

B)    Conclusion

C)    Some elephants are forests.

D)    No elephant is forest.

View Answer

Answer: option (C)

Explanation:

As the middle term ‘lions’ is not distributed even once in the premises, no definite conclusion follows. Although, ‘I’ and ‘II’ involve only the major terms and form a complementary pair. So, either ‘I’and ‘II’ follows.

 

10. Statement

A)    All pillars are rods. Some ships are not pillars.

B)    Conclusion

C)    All rods are ships.

D)    Some ships are not rods.

View Answer

Answer: option (D)

Explanation:

Since, both the terms ‘rods’ is distributed in both the conclusions without being distributed in any of the premises. So, it does not follow any conclusion.

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