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- % Possibilities
- suspect(ms-scarlet; colonel-mustard).
- weapon(revolver; candle).
- place(kitchen; hall; dining-room).
- % One possibility only
- 1{murderer(X):suspect(X)}1.
- 1{weapon-of-crime(X):weapon(X)}1.
- 1{place-of-crime(X):place(X)}1.
- % Card deduction
- :- place(kitchen).
- place(hall) :- murderer(colonel_mustard), not weapon(revolver).
- weapon(candle).
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