Verbal Reasoning - Syllogism - Discussion

Discussion Forum : Syllogism - Syllogism 3 (Q.No. 6)
Directions to Solve
In each of the following questions there are three statements. Which are followed by three or four conclusions. Choose the conclusions which logically follow from the given statements.

6.

Statements: Some rats are cats. Some cats are dogs. No dog is cow.

Conclusions:

  1. No cow is cat.
  2. No dog is rat.
  3. Some cats are rats.

Only (1)
Only (1) and (2)
Only (1) and (3)
Only (2) and (3)
Only (3)
Answer: Option
Explanation:
Discussion:
45 comments Page 1 of 5.

Surya said:   1 year ago
Guys option 3 is correctt. Because. If you are checking for No conclusion. You have to check the basic and possibility diagram. The basic diagram is given diagram. In that case, there is no link between a cat and a cow.

So, it is true in the basic diagram. The possibility diagram which is, you have to think about whether any possibility of linking the cat and cow. Yes, you have.

If you have the possibility but in conclusion, they said not. So it is false. If you choose the "No" conclusion, it should satisfy both the basic and possibility diagram. Here only one can satisfy. So 1st option is not correct. Similar to 2nd option. Then only the last is correct.
(2)

Sundar said:   1 decade ago
@Rajkumar Verma

The answer for your question is 'Conclusion 1 not follows.'.

--------------------------

@All

Now, I'm coming to given question.

The conclusion(3) "Some cats are rats" is just the convergence of the given statement "Some rats are cats".

So conclusion(3) follows.

According to the given diagrams, conclusion (1) and (2) are not follows logically (in all situation).

Therefore, the given answer "Only 3" is correct.

Nishanth K said:   1 decade ago
In order for the conclusion to be true, it should satisfy all possible probabilities. So you have to draw all possible venn diagrams and see if the conclusion is satisfying all of them. It is a conclusion if it satisfies all scenarios. If it doesn't then it is a probability and not a conclusion. So in the above problem, Conclusion No.3, "Some cats are rats" is the only conclusion which satisfied both the scenarios.

Hope this helps.

Tony said:   1 decade ago
No cow is a cat. is this statement not right ?

For if we include the Venn of cow to that of rat or cat, we are making an assumption. And we are not supposed to make assumptions in Venn diagrams, rather draw only what is given according to the statements.

My Venn diagram did not match with those given here, but until now the answers were matching, except for this one : (.

Ganga said:   1 decade ago
According to the statement all the three statements are true, but when we think logically,

Assume that:

Some cows are cat.
Some dogs are rat.

First 2 statements are false and 3rd statement is true.

So first and second statements can be either case but the 3rd statement is true.

So only 3 follows.

We should think all possible ways.

Venn Master said:   1 decade ago
Just explain How "No cow is cat" not follows ? According to first diagram Cow is not related to anything. We have clear statement in the questions, on which we have to give answer. So how can you make your own assumptions/Possibility (Which is not stated in the question) ? If you can then can I make statements like all cows cat ?

Naveen Kumar said:   1 year ago
I think 2 and 3 follow because it is mentioned in the question that some rats are cats and some cats are dogs. Then how can the 2nd statement is false?

No dog is a rat should be true right.

So, The first statement is of course false. But 2 and 3 should be true.
(3)

Amit Gosain said:   9 years ago
Answer should be 1 and 3 follows.

I try all possible positions and 1 more thing is that 2 venn diagram is wrong as we all know No cow is a dog so we can't assume a relation between them. So, the answer is 1 and 3.

Billicheran said:   7 years ago
Only conclusion number 3 follows. According to the last statement, No dog is a cow. It means that no cow is dog, but it doesn't say that no cow is cat. Check out the second possible diagram.

Joseph said:   5 years ago
According to me, the 2nd Venn diagram is wrong.

Cows should be separate to Dogs Rats and Cows according to the statements. There is nothing showing that Cows are part of any group.
(7)


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