Verbal Reasoning - Syllogism - Discussion

Discussion Forum : Syllogism - Syllogism 2 (Q.No. 3)
Directions to Solve
In each of the following questions two statements are given. Which are followed by four conclusions (1), (2), (3) and (4). Choose the conclusions which logically follow from the given statements.


Statements: All men are vertebrates. Some mammals are vertebrates.


  1. All men are mammals.
  2. All mammals are men.
  3. Some vertebrates are mammals.
  4. All vertebrates are men.

Only (4)
Only (2)
Only (3)
Only (1)
Only (1) and (3)
Answer: Option
26 comments Page 1 of 3.

Riddle42 said:   8 years ago
The correct answer is C, that means that conclusion 1,2, and 4 are wrong.

Conclusion 1 " all men are mammals," and 2 "all mammals are men," are the same in this context. They are wrong because they do not agree with the statements "All men are vertebrates. Some mammals are vertebrates." If all men were mammals, then not some, but all mammals were vertebrates. That is not the case.

Tanmay said:   9 years ago
Sir I didn't understand the 2nd diagram. Here we can't tell that some mammals are men too. That not given in statement. As I know that we can't think anything extra that's not given. Is it a case of possibility ?

Ravinder kumar said:   9 years ago
Hello @Anki,

Here terms are "All men" and "Some Mammals" and they will always give no conclusion as they represent different categories. Solve Syllogism problems (including possibility type) in few seconds.

Divyanshu_Tat said:   8 years ago
All + some = some,
Some men are vertebrates,so in this sentence, both are not distributed and middle term = vertebrates are also not distributed. So the answer is no conclusion.

SUPRAJ said:   8 years ago

-UNTIL the STATEMENT is given that some men are mammals or all men are mammals or vice versa. We cannot conclude the CONCLUSION to be correct.

Neetu said:   8 years ago
I have to ask a little clarification.

Conclusion : Some men are vertebrates.

This conclusion is true or false, please explain your answer.

Sumair said:   9 years ago
There should be three diagrams, all mans are mammals can be true if the diagram of circle of mammal in diagram 2 is increased.

Akash said:   1 decade ago
why can't all men who are vertebrates, also be mammals? In my opinion, there are three possibilities, not two.

Swati said:   7 years ago
Conclusion can not be drawn as a middle term 'vertebrates' is not distributed in any of the statement.

Pallabi Banerjee said:   8 years ago
Option 4 is also correct. Because all men are vertebrate simultaneously all vertebra are men.

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