Logical Reasoning - Logical Deduction - Discussion

In each of the following questions, two statements are given followed by three or four conclusions numbered I, II, III and IV. You have to take the given statements to be true even if they seem to be at variance from the commonly known facts and then decide which of the given conclusions logically follows from the given statements disregarding commonly known facts.

7. 

Statements: All terrorists are guilty. All terrorists are criminals.

Conclusions:

  1. Either all criminals are guilty or all guilty are criminals.
  2. Some guilty persons are criminals.
  3. Generally criminals are guilty.
  4. Crime and guilt go together.

[A]. Only I follows
[B]. Only I and III follow
[C]. Only II follows
[D]. Only II and IV follow

Answer: Option C

Explanation:

Since the middle term 'terrorists' is distributed twice in the premises, the conclusion cannot be universal. So, it follows that 'Some guilty persons are criminals'. Thus, II holds.

Rupali said: (Jun 9, 2012)  
Please explain it with the help of venn diagram as according to it option A holds in the above case.

Gautam said: (Nov 6, 2013)  
I don't agree with the answer. Middle term distributed twice. Only conclusions are Some guilty are terrorists and Some criminals are terrorists. How is the answer "Some guilty are criminals".

Prachi said: (Apr 14, 2014)  
I don't agree with the answer. Here the given statements are to be considered absolute, and hence as mentioned in the statements only option A holds true.

Please explain further why option C is true?

Debdyuti said: (Mar 12, 2015)  
I think Option A is more appropriate in this case. If we go for a venn diagram in this case then it becomes evident.

Rizwana said: (Sep 23, 2015)  
I think A is correct. Please explain why answer C with venn diagram.

Asha said: (May 3, 2016)  
Usually, criminals are guilty and some of the guilty people are criminals so there is a relation with crime and guilt.

I feel option D is the correct one, please explain the reason that the answer is C.

Nachi said: (Dec 2, 2016)  
I am not understand this. Please help me.

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