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Logical Reasoning - Logical Deduction - Discussion

Discussion Forum : Logical Deduction - Section 4 (Q.No. 23)
Logical Deduction
Directions to Solve

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

23.

Statements: Some tapes are discs. Some discs are cassettes. Some cassettes are songs.

Conclusions:

  1. Some songs are discs.
  2. Some cassettes are tapes.
  3. Some songs are tapes.
  4. No song is a disc.

Only either I or IV follows
Only either II or IV follows
Only III and IV follow
Only III and either II or IV follows
None of these
Answer: Option
Explanation:

Since each combination of premises shall contain two particular premises, no definite conclusion can be drawn. However, I and IV involve the extreme terms of the second and third premises and form a complementary pair. Thus, either I or IV follows.

Discussion:
3 comments Page 1 of 1.
Piyush Kulkarni said:   1 decade ago
Here answer should be E because even a case will lead to failure of that conclusion. If instead of conclusion they would have asked possibility then answer was A.

But here they have asked conclusion so in conclusion I and IV, at least one case is coming wrong so answer must be E that is none of these.
M254 said:   3 years ago
Since they are all particular, no definite conclusion can be drawn.

Therefore the answer should only be E.
Vishal said:   7 years ago
Yes, right @Piyush. It should be either only IV or none of the these.
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