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2. What does \+ mean in Prolog? - Stack Overflow

   stackoverflow.com/questions/1712034

   3. W.r.t. the shape of the operator, in logic "provable" is usually written as a turnstile: |- . So in "not provable" \+ the \ stands for the long vertical bar and the vertical bar in the + stands for a slash doing the negation. – starblue. Nov 11, 2009 at 6:44.

3. What is the difference between == and = in Prolog?

   stackoverflow.com/questions/8219555

   See the nice set of examples in the Amzi! Prolog documentation. \= means the two terms cannot be unified, i.e. that unification fails. As with all applications of negation as failure, "not unified" does not (and cannot) result in any unification between terms. \== means the two terms are not identical. Here also no unification takes place even ...

4. math - Prolog =:= operator - Stack Overflow

   stackoverflow.com/questions/1417253

   Part of the brilliant genius of prolog , in my opinion , is that every op IS a funktor (predicate) . In fact , every element of your source becomes a predicate . In this way it can be seen that the function of tokenizing and parsing in the prolog interprter is to produce a syntax tree , and that syntax tree is entirely specified via funktor .

5. 'if' in prolog? - Stack Overflow

   stackoverflow.com/questions/2849045

   There are essentially three different ways how to express something like if-then-else in Prolog. To compare them consider char_class/2. For a and b the class should be ab and other for all other terms. One could write this clumsily like so: char_class(a, ab). char_class(b, ab). char_class(X, other) :-.

6. syntax - Prolog "or" operator, query - Stack Overflow

   stackoverflow.com/questions/13506569

   Performing an "or" in Prolog can also be done with the "disjunct" operator or semi-colon: X = ct101; X = ct102; X = ct103. For a fuller explanation: Predicate control in Prolog.

7. Prolog Family tree - Stack Overflow

   stackoverflow.com/questions/679728

   Furthermore, Prolog assumes there should be a sibling/2 predicate somewhere and uses father/2. It does this because you define list of siblings on the bottom of your KB. Again, place them together like below.

8. What's the -> operator in Prolog and how can I use it?

   stackoverflow.com/questions/1775651

   3. It's a local version of the cut, see for example the section on control predicated in the SWI manual. It is mostly used to implement if-then-else by (condition -> true-branch ; false-branch). Once the condition succeeds there is no backtracking from the true branch back into the condition or into the false branch, but backtracking out of the ...

9. Logical OR in Prolog - Stack Overflow

   stackoverflow.com/questions/43768604

   Prolog makes a 'closed world' assumption. It can only evaluate the trueness or falseness of a predicate that is defined. That means that you need at least one clause that has the predicate on its left hand side (or a fact, as this will be interpreted as a clausel with no condition thus without a right hand side).

10. Prolog: And-Or expressions (boolean function) - Stack Overflow

    stackoverflow.com/questions/20104042

    8. I am doing a homework need to implement two relations and (A,B) and or (A,B) that perform the logical “AND” and the logical “OR” operations on two Boolean operands A and B. Relation and (A,B)holds if A and B both evaluate to true. Relation or (A,B)holds if either A or B evaluates to true, or both A and B evaluate to true.

11. How to negate in Prolog - Stack Overflow

    stackoverflow.com/questions/10141600

    The solution is actually in the exercise file on that page: female(X) :- \+ male(X). As @Mog said, negation is the unary \+ operator. answered Apr 13, 2012 at 13:27. Volker Stolz. 7,382 1 34 51. Reminder: Answers generated by artificial intelligence tools are not allowed on Stack Overflow. Learn more.