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Question

R2D2 is a robot. R2D2 can repair aeroplanes. No other robot can repair aeroplanes.

Which of the following can be logically inferred from the above statements?

The correct answer is

R2D2 is the only robot which can repair aeroplanes.

Analyze R2D2 Robot Repair Aeroplanes Logical Inference

This question involves analyzing a set of statements to determine the correct logical inference. Let's break down the given information:

  • Statement 1: R2D2 is a robot.
  • Statement 2: R2D2 can repair aeroplanes.
  • Statement 3: No other robot can repair aeroplanes.

We need to find the conclusion that logically follows from these three statements.

Evaluating the Options

Let's examine each option to see if it can be directly inferred:

Option 1: R2D2 is a robot which can only repair aeroplanes.

This statement implies that R2D2 is limited to *only* repairing aeroplanes and cannot perform any other tasks. The given statements tell us what R2D2 *can* do (repair aeroplanes) and what other robots *cannot* do, but they do not restrict R2D2's capabilities to just aeroplane repair. Therefore, this inference is not necessarily true.

Option 2: R2D2 is the only robot which can repair aeroplanes.

This statement combines Statement 2 ("R2D2 can repair aeroplanes") and Statement 3 ("No other robot can repair aeroplanes"). If R2D2 possesses the ability to repair aeroplanes, and all other robots lack this specific ability, then it logically follows that R2D2 is the unique robot capable of repairing aeroplanes. This statement is a direct and valid inference.

Option 3: R2D2 is a robot which can repair only aeroplanes.

Similar to Option 1, this statement places a restriction on R2D2's abilities, suggesting aeroplane repair is its sole function. The provided statements do not give us information about R2D2's other potential functions or limitations. Thus, we cannot infer this specific restriction.

Option 4: Only R2D2 is a robot.

Statement 1 confirms R2D2 is a robot. Statement 3 says "No *other* robot can repair aeroplanes," which implies the existence of potentially other robots, but specifies their inability to repair aeroplanes. It does not state that R2D2 is the *only* robot in existence. Therefore, this inference is incorrect.

Conclusion

Based on the analysis, the only statement that can be logically inferred directly from the given premises is that R2D2 holds the exclusive ability among robots to repair aeroplanes.

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Important Questions from Critical Reasoning

  1. As a responsible person, which of the following is not advisable?

  2. A, B, and C have a few chocolates among themselves. A gives to each of the other two half the number of chocolates they already have. Similarly B and C (in that order) give each of the other two half the number of chocolates each of them already has. Now, if each of them has the same number of chocolates, what could be the minimum number of chocolates they have among themselves?
  3. Given question has main statement followed by four statements. Choose the ordered pair of statements, where the first statement implies the second, and the two statements are logically consistent with the main statement.

    When she takes an examination, she clears it.

    A. she took an examination

    B. she did not take an examination

    C. she cleared it.

    D. she did not clear it.

  4. You are alone in your house and there is a danger of thieves around. You hear a knock on the door. What should be your most logical action?

  5. While traveling in a train, you notice that a lady from the coach behind you falls from the stairs of the train. What should be your best rational course of action?

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