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Question

Read the given statements and conclusions carefully. Assuming that the information given in the statements is true, even if it appears to be at variance with commonly known facts, decide which of the given conclusions logically follow(s) from the statements.
Statements:
Some crocodiles are tubes.
All tubes are socks.
No sock is a menu.
Conclusions:
(I) Some menus are not socks.
(II) No sock is a crocodile.
(III) Some adapters are houses.

This question was previously asked in
SSC Selection Post 2024 Question Paper (26-Jun-2024) (Shift-4)
The correct answer is
Only conclusion I follows

Analyzing the Syllogism: Statements and Conclusions

This problem involves logical reasoning, specifically analyzing syllogisms. We need to determine which conclusions logically follow from the given statements.

Understanding the Statements

Let's break down each statement to understand the relationship between the terms:

  • Statement 1: Some crocodiles are tubes. This indicates that there is at least one crocodile that is also a tube. The sets 'crocodiles' and 'tubes' overlap.
  • Statement 2: All tubes are socks. This means the entire set of 'tubes' is included within the set of 'socks'. Anything that is a tube is automatically a sock.
  • Statement 3: No sock is a menu. This establishes a complete separation between the set of 'socks' and the set of 'menus'. They share no common members. This statement also implies that no menu is a sock.

Combining Information from Statements

By combining the statements, we can infer additional relationships:

  • From Statement 1 (Some crocodiles are tubes) and Statement 2 (All tubes are socks), we can logically conclude that some crocodiles are socks. The crocodiles that belong to the 'tubes' category must also belong to the 'socks' category.
  • Statement 3 clearly states that the categories 'socks' and 'menus' are mutually exclusive. Using set notation, if $S$ represents the set of socks and $M$ represents the set of menus, then $S \cap M = \emptyset$.

Evaluating the Conclusions

Evaluating Conclusion I: Some menus are not socks

Statement 3 tells us "No sock is a menu", which is logically the same as "No menu is a sock". This means the sets M (menus) and S (socks) are disjoint ($M \cap S = \emptyset$). If no menu is a sock, then any item belonging to the set of menus definitely does not belong to the set of socks. Therefore, assuming the set of menus is not empty (which is standard in these problems), it is true that some menus are not socks. This conclusion logically follows.

Evaluating Conclusion II: No sock is a crocodile

As derived earlier, combining statements 1 and 2 leads to the conclusion that "Some crocodiles are socks". Conclusion II states "No sock is a crocodile". These two statements directly contradict each other. If it's true that some crocodiles are socks, then it cannot be true that no sock is a crocodile. Therefore, Conclusion II does not logically follow.

Evaluating Conclusion III: Some adapters are houses

The terms 'adapters' and 'houses' appear in Conclusion III but are not mentioned in any of the provided statements. Logical conclusions must be based solely on the information given in the statements. Since 'adapters' and 'houses' are unrelated to 'crocodiles', 'tubes', 'socks', or 'menus' within the context of the statements, this conclusion cannot be logically derived. Therefore, Conclusion III does not logically follow.

Final Conclusion

Based on the step-by-step analysis:

  • Conclusion I logically follows from the statements.
  • Conclusion II does not follow because it contradicts information derived from the statements.
  • Conclusion III does not follow because it introduces terms not present in the statements.

Hence, only Conclusion I is a valid deduction.

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Similar Questions

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Important Questions from Syllogism

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  4. Read the given statements and conclusions carefully. Assuming that the information given in the statements is true, even if it appears to be at variance with commonly known facts, decide which of the given conclusions logically follow(s) from the statements.

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