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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 :

1. All gymnasiums have an electric machine.

2. P is a gymnasium.

Conclusions :

I. Places other than gymnasium do not have an electric machine.

II. P has an electric machine.

The correct answer is

Only conclusion II follows.

Understanding Logic: Statements and Conclusions Analysis

This question asks us to analyze given statements and determine which of the provided conclusions logically follow from them. We must assume the statements are true, regardless of common knowledge.

Analyzing the Statements

Let's break down the information given in the statements:

  • Statement 1: All gymnasiums have an electric machine. This establishes a relationship: If something is a gymnasium, it possesses an electric machine. It does *not* say that only gymnasiums have electric machines.
  • Statement 2: P is a gymnasium. This identifies a specific entity, P, and assigns it the property of being a gymnasium.

Analyzing the Conclusions

Now, let's evaluate each conclusion based *only* on the information provided in the statements:

  • Conclusion I: Places other than gymnasium do not have an electric machine.

    This conclusion makes a claim about things that are *not* gymnasiums. Statement 1 tells us about gymnasiums (they *do* have electric machines). It provides no information whatsoever about places that are *not* gymnasiums. Such places *might* have electric machines, or they might not. We cannot conclude anything definitive about places other than gymnasiums from the given statements.

    Therefore, Conclusion I does not logically follow from the statements.

  • Conclusion II: P has an electric machine.

    Statement 2 tells us that P is a gymnasium.

    Statement 1 tells us that *all* gymnasiums have an electric machine.

    Since P falls into the category of 'gymnasium' (from Statement 2), and every member of this category has an electric machine (from Statement 1), it logically follows that P must have an electric machine.

    Therefore, Conclusion II logically follows from the statements.

Final Deduction

Based on our analysis, only Conclusion II can be logically derived from the given statements. Conclusion I makes an assumption about entities not mentioned in the necessary context by the statements.

Thus, only conclusion II follows.

Summary of Analysis
Item Based on Statements Logically Follows? Reasoning
Statement 1 All Gymnasiums have Electric Machines N/A Given as true
Statement 2 P is a Gymnasium N/A Given as true
Conclusion I Places other than Gymnasium do not have Electric Machines No Statements provide no info about non-gymnasiums.
Conclusion II P has an Electric Machine Yes P is a Gymnasium (Stmt 2) and all Gymnasiums have Electric Machines (Stmt 1).

Revision Table: Logic Statements and Conclusions

Here's a quick summary of the concepts involved in solving such logic problems:

Logic Concepts
Concept Explanation Example (from this problem)
Statement Given information assumed to be true. "All gymnasiums have an electric machine."
Conclusion A proposition that must be evaluated for logical validity based on the statements. "P has an electric machine."
Logical Deduction Deriving a conclusion that is necessarily true if the statements are true. From "All A are B" and "C is A", concluding "C is B".
Inverse Fallacy Assuming that if "All A are B", then "All non-A are non-B". This is incorrect. Assuming if "All gymnasiums have electric machines", then "All non-gymnasiums do not have electric machines".

Additional Information: Syllogism Basics

This question is a simple example of a categorical syllogism. A categorical syllogism is a deductive argument consisting of two premises (statements) and one conclusion. The premises and conclusion are categorical propositions, which assert a relationship between two categories or classes.

Key types of categorical propositions:

  • Universal Affirmative (All A are B): Every member of class A is also a member of class B. (e.g., All gymnasiums are places with electric machines).
  • Universal Negative (No A are B): No member of class A is a member of class B. (e.g., No gymnasium is a place without an electric machine).
  • Particular Affirmative (Some A are B): At least one member of class A is a member of class B. (e.g., Some gymnasiums are large buildings).
  • Particular Negative (Some A are not B): At least one member of class A is not a member of class B. (e.g., Some gymnasiums are not air-conditioned).

In our problem, Statement 1 ("All gymnasiums have an electric machine") is a Universal Affirmative proposition. Statement 2 ("P is a gymnasium") identifies a specific instance belonging to the first category. Conclusion II ("P has an electric machine") correctly applies the rule from the universal statement to the specific instance, which is a valid form of deduction (often related to Modus Ponens in propositional logic or universal instantiation in predicate logic).

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Important Questions from Statements and Conclusions

  1. A situation is given, followed by two conclusions I and II. Read the situation and both the conclusions carefully and select the correct answer.

    Situation:

    Since the past 15 years, 75% of the products in the world’s pottery market comes from Country K. However, the employment in the pottery industry of Country K has been consistently declining by 5-9% every year since the past 3 years.

    Conclusions:

    I. Even after declining employment, Country K has enough potters to continue contributing equally to the international market.

    II. The local demand of pottery in Country K has substantially decreased leading to less interest among potters.

  2. The statement below is followed by three conclusions labelled I, II and III. You have to assume everything in the statement to be true, and then decide which of the three suggested conclusions logically follows for pursuing.

    Statements:

    1) No school is an institution but they are establishment.

    2) All establishments that are not institutions have buildings.

    Conclusions:

    I. Schools are not establishments.

    II. All schools have buildings.

    III. Schools do not have buildings.
  3. Read the given statements and conclusion carefully and decide which of the following options is true with respect to the given conclusion.

    Statements:

    The Gateway of India is in Mumbai.

    Mumbai is in India.

    Conclusion:

    The Gateway of India is in India.

  4. Read the given statements and conclusion carefully and decide which of the following options is true with respect to the given conclusion.

    Statements:

    Men who are handsome are generally of the intellectual type.

    Vikram is handsome.

    Conclusion:

    Vikram is intellectual.
  5. Given is a statement, followed by four conclusions. Read the statement carefully and decide which of the conclusions logically follow(s) from the given statement.

    Statement:

    This book can help because all good books help.

    Conclusions:

    I. This is not a good book.

    II. This is a good book.

    III. No good book helps.

    IV. Some good books help.

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