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?
1. R2D2 is a robot which can only repair aeroplanes.
2. R2D2 is the only robot which can repair aeroplanes.
3. R2D2 is a robot which can repair only aeroplanes.
4. Only R2D2 is a robot.

Answer 1

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

There are two facts. R2D2 is a robot who can repair aeroplanes and no other robot can do this work. The other functions of R2D2 is not known and thus inference 1 does not follow.

We do not know whether R2D2 can repair anything else other than aeroplanes. Thus option 3 does not follow.

There can be other robots and thus option 4 is eliminated.

Only option 2 is the logical inference that follows.