My solutions to the exercises and practical sessions of the book 'Learn Prolog Now!' by Patrick Blackburn, Johan Bos, and Kristina Striegnitz.
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Fix `X` to anonymous variable in `greater_than` #49
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ychikazawa closed 5 years ago
WHAT
greater_than(succ(X),0).togreater_than(succ(_),0).WHY
The warning: "Singleton variables: [X]" has been issued.