Puzzles/Logic puzzles/Knights, Knaves & Spies/Solution

Puzzles | Logic puzzles | Knights, Knaves & Spies | Solution

A - Knight B - Spy C - Knave

Reasoning
B is not the knight, since if he is, then A would also be the knight.

C is not the knight, since his statement would then be a lie. Therefore A is the knight.

Hence C is the knave, and B is the spy.