Discussion
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?
Answer: B
The valid inference is R2D2 is the only robot which can repair aeroplanes.
The statements say R2D2 is a robot, it can repair aeroplanes, and no other robot can. Put together, among robots R2D2 alone can repair aeroplanes.
The other options say things the statements never mention. 'Can only repair aeroplanes' and 'can repair only aeroplanes' both claim R2D2 has no other skills or repairs nothing else, but nothing limits what else it can do. 'Only R2D2 is a robot' denies that other robots exist, yet 'no other robot' implies that other robots may well exist.
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