Verbal Reasoning - Syllogism - Discussion

Discussion Forum : Syllogism - Syllogism 1 (Q.No. 11)
Directions to Solve

In each of the following questions two statements are given and these statements are followed by two conclusions numbered (1) and (2). You have to take the given two statements to be true even if they seem to be at variance from commonly known facts. Read the conclusions and then decide which of the given conclusions logically follows from the two given statements, disregarding commonly known facts.

Give answer:

  • (A) If only (1) conclusion follows
  • (B) If only (2) conclusion follows
  • (C) If either (1) or (2) follows
  • (D) If neither (1) nor (2) follows and
  • (E) If both (1) and (2) follow.

11.

Statements: Some dogs are bats. Some bats are cats.

Conclusions:

  1. Some dogs are cats.
  2. Some cats are dogs.

Only (1) conclusion follows
Only (2) conclusion follows
Either (1) or (2) follows
Neither (1) nor (2) follows
Both (1) and (2) follow
Answer: Option
Explanation:
Discussion:
59 comments Page 5 of 6.

Nav said:   1 decade ago
Firstly we have to make Venn diagrams for all the possibilities which arise in the statements. Then jump onto conclusions and check whether the conclusions are true in all the diagrams. If yes, the conclusion follows. If it is not correct even in one case, that means that conclusion does not follow.
Rest all depends on practice.

Thanks

Pox said:   1 decade ago
For an answer to be right, all the conditions must be satisfied, and for it to be wrong, one anomaly is enough.

For e.g. consider x/x..well, we may say x/x is 1, if x belongs to real numbers, but that is incorrect, since at x=0, 0/0 is not defined..since one value of x creates anomaly, thus we dont write x/x=1, for all x belongs to R.

Vartika said:   1 decade ago
Another way of seeing it.

In order for a syllogism to be valid, at least one of the two premises must contain a universal form. If both premises are particulars, then no valid conclusion can follow. For example, if "some cats are black" and "some black things are tables", it does not follow that "some cats are tables".

Sujatha said:   1 decade ago
But both the conclusions are complementary pairs know so either nor won't come in the answer? please clarify my doubt.

Shatrughna said:   1 decade ago
If there is no use of the second fig. Then why is it there leading to confusions and ambiguity?

Pramod jangir said:   1 decade ago
If both the venn diagrams are looking right, then which answer should we put? please clear the confusion.

Jagdsih said:   1 decade ago
We always have confusion about the option C or D e.g. Either (1) or (2) follows and Neither (1) nor (2) follows. Either (1) or (2) follows option directly relates to complimentary pair. does anybody explain about complimentary pair?

So ni said:   1 decade ago
Can you tell me what is the use of second venn diagram?

Ujjwal chitransh said:   1 decade ago
The basis of solving all such possibilities is to ensure that even if any one of the Venn diagram points to the possibility listed in the question. Hence figure b justifies both possibilities.

So E is correct answer.

Bhautik savaliya said:   8 years ago
Thanks for the given explanation.


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