Classical

Decision Making - Set 2

Instructions:  

One statement is given followed by several conclusions in each question.
Choose the right one among the alternatives given.

1:  

 He is an historian, so he can not write novels

 

A.

No historian can write novels

B.

Some historians can write novels

C.

Historians can seldom write novels

D.

All of these

 
 

Option: A

Explanation :

The word 'so.' declares that all historians can not write novels.


2:  

It is obviously false that dictators always retire voluntarily

A.

Some who retire voluntarily are not dictators

B.

Many who retire voluntarily are other than dictators

C.

Dictators rarely retire voluntarily

D.

All of these

 
 

Option: D

Explanation :

In logic always is the converted form of rarely.


3:  

Devil is an enemy because he deceives the people

A. Those who deceive the people are enemies
B. All those who deceive the men are devils
C. Enemies deceive the people
D. All of these .
 
 

Option: A

Explanation :
If devil ceases to deceive the people he
wil not remain the enemy. So option (a)
is only correct


4:  

This man can't succeed because he is not truthful

A.

Those who can get success are truthful

B.

All truthful persons succeed

C.

Only successful persons are truthful

D.

None of these

 
 

Option: B

Explanation :

The sentence is exclusive. Had he been truthful he would have succeeded. It otherwise means all truthful persons succeed. Double negatives used in a sentence make it affirmative.


5:  

Some doctors are not policemen

A.

Some doctors are poicemen

B.

Some policemen are not doctors

C.

Both of the above

D.

None of these

 
 

Option: C

Explanation :

Option (a) is the obverted form and (c) is the converted form of the premise.




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