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Question

Three Statements are given followed by Three conclusions numbered I, II and III. Assuming the statements to be true, even if they seem to be at variance with commonly known facts, decide which of the conclusions logically follow(s) from the statements.

Statements:

All bottles are containers.

Some containers are buckets.

All buckets are soaps.

Conclusions:

I. Some soaps are bottles.

II. Some buckets are bottles.

III. Some soaps are containers.

This question was previously asked in
SSC CGL 2023 (Tier-II) Paper 1 Previous Year Paper (26-Oct-2023) (Shift-1)
The correct answer is

Only conclusion III follows.

Analyzing Syllogism Statements and Conclusions

This question asks us to analyze three statements and determine which of the three given conclusions logically follow from these statements, assuming the statements are true.

Understanding the Statements

Let's represent the categories using symbols:

  • Bottles (B)
  • Containers (C)
  • Buckets (Bu)
  • Soaps (S)

The statements are:

  1. All bottles are containers. \( \text{All B} \subseteq \text{C} \)
  2. Some containers are buckets. \( \text{C} \cap \text{Bu} \neq \emptyset \)
  3. All buckets are soaps. \( \text{All Bu} \subseteq \text{S} \)

Evaluating the Conclusions

We need to check if each conclusion can be logically derived from the given statements.

Conclusion I: Some soaps are bottles.

This conclusion suggests there is an overlap between the set of soaps and the set of bottles ( \( \text{S} \cap \text{B} \neq \emptyset \) ).

  • Statement 1 tells us bottles are a subset of containers.
  • Statement 2 tells us there's an overlap between containers and buckets.
  • Statement 3 tells us buckets are a subset of soaps.

From statements 2 and 3, we know that some containers are buckets, and these buckets are all soaps. So, some containers are soaps. However, this doesn't necessarily mean any of these "some containers" that are also soaps are the specific containers that are bottles. The overlap between containers and buckets could be in a part of the containers that are not bottles.

Therefore, based on the given statements, we cannot definitively conclude that some soaps are bottles. Conclusion I does not logically follow.

Conclusion II: Some buckets are bottles.

This conclusion suggests there is an overlap between the set of buckets and the set of bottles ( \( \text{Bu} \cap \text{B} \neq \emptyset \) ).

  • Statement 1 tells us bottles are a subset of containers (\( \text{B} \subseteq \text{C} \)).
  • Statement 2 tells us some containers are buckets (\( \text{C} \cap \text{Bu} \neq \emptyset \)).

Statement 1 places bottles entirely within containers. Statement 2 indicates that buckets overlap with containers. However, this overlap between containers and buckets could be entirely with the part of containers that is *not* bottles. There is no information directly linking bottles and buckets or showing an overlap between them.

Therefore, we cannot conclude that some buckets are bottles. Conclusion II does not logically follow.

Conclusion III: Some soaps are containers.

This conclusion suggests there is an overlap between the set of soaps and the set of containers ( \( \text{S} \cap \text{C} \neq \emptyset \) ).

  • Statement 2 says: Some containers are buckets (\( \text{C} \cap \text{Bu} \neq \emptyset \)). This means there exists at least one item that is both a container and a bucket.
  • Statement 3 says: All buckets are soaps (\( \text{All Bu} \subseteq \text{S} \)). This means any item that is a bucket is also a soap.

Combining these two statements: Since there is at least one item that is a container and a bucket (from Statement 2), and every item that is a bucket is also a soap (from Statement 3), it must be true that this item is also a soap. Therefore, there exists at least one item that is a container and a soap.

This means some containers are soaps, which is logically equivalent to "Some soaps are containers". Conclusion III logically follows.

Summary of Conclusions

  • Conclusion I: Some soaps are bottles - Does NOT follow.
  • Conclusion II: Some buckets are bottles - Does NOT follow.
  • Conclusion III: Some soaps are containers - FOLLOWS.

Based on the analysis, only Conclusion III logically follows from the given statements.

Revision Table: Syllogism Analysis

Statement/Conclusion Relationship Logical Follows? Reasoning
Statement 1 All Bottles are Containers (\( \text{B} \subseteq \text{C} \)) N/A Given
Statement 2 Some Containers are Buckets (\( \text{C} \cap \text{Bu} \neq \emptyset \)) N/A Given
Statement 3 All Buckets are Soaps (\( \text{Bu} \subseteq \text{S} \)) N/A Given
Conclusion I Some Soaps are Bottles (\( \text{S} \cap \text{B} \neq \emptyset \)) No No definite link established between Bottles and Buckets/Soaps from the statements.
Conclusion II Some Buckets are Bottles (\( \text{Bu} \cap \text{B} \neq \emptyset \)) No Overlap between Containers and Buckets doesn't guarantee overlap with the subset Bottles.
Conclusion III Some Soaps are Containers (\( \text{S} \cap \text{C} \neq \emptyset \)) Yes Some Containers are Buckets (Stmt 2), and All Buckets are Soaps (Stmt 3). > Therefore, Some Containers are Soaps.

Additional Information on Syllogisms

Syllogisms are a form of logical reasoning where a conclusion is drawn from two or more premises (statements). They are common in logical reasoning and aptitude tests.

Key concepts in Syllogism:

  • Statements/Premises: These are the given facts assumed to be true. They usually involve terms like "All," "No," "Some," and "Some Not."
  • Conclusions: These are the inferences drawn from the statements.
  • Logical Follows: A conclusion logically follows if it must be true whenever the statements are true.
  • Types of Statements:
    • Universal Affirmative (All A are B): \( \text{A} \subseteq \text{B} \)
    • Universal Negative (No A are B): \( \text{A} \cap \text{B} = \emptyset \)
    • Particular Affirmative (Some A are B): \( \text{A} \cap \text{B} \neq \emptyset \)
    • Particular Negative (Some A are not B): \( \text{A} \setminus \text{B} \neq \emptyset \)
  • Venn Diagrams: These diagrams are useful tools to visually represent the relationships between sets described in the statements and check the validity of conclusions.

When solving syllogism problems, always rely strictly on the given statements and the rules of logic, even if they contradict commonly known facts.

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Similar Questions

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Important Questions from Conventional Syllogism

  1. In this question, three statements followed by two conclusions numbered I and II have been given. You have to take the given statements to be true even if they seem to be at variance from the commonly facts and then decide which of the given conclusions logically follows from the given statements disregarding commonly known facts.

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  2. 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:

    I. Some blue are red.

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  3. In the question two statements are given, followed by three conclusions, I, II and III. You have to consider the statements to be true even if it seems to be at variance from commonly known facts. You have to decide which of the given conclusions, if any, follows from the given statements.

    Statement 1 : Some cars are scooters.

    Statement 2 : All scooters are buses.

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  4. Read the given statements and conclusions carefully. Assuming that the information in the statement is true even if they appear to be at variance with commonly known facts, choose the conclusion that logically follows from the statement beyond reasonable doubt.

    Statement:-

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    2. All cats are birds.

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  5. In each question below are given three statements followed by two conclusions numbered I and II. You have to take the two/three given statements to be true even if they seem to be at variance from commonly known facts and then decide which of the given conclusions logically follows from the given statements disregarding commonly known facts.

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