Prolog languages are logics that are used when creating programs that require artificial intelligence.
The prolog rule to define the predicate grandfather(x, y) is grandfather(X,Y) :- mother(M,Y), father(X,M); father(F,Y), father(X,F)
<h3>How to determine the prolog rule</h3>
From the question, we have the following definitions:
- mother(m, y): m is the mother of y
- father(f, x): f is the father of x
For x to be the grandfather of y, then either of the following definitions must be true
- m is the mother of y, and x is the father of m
- f is the father of y, and x is the father of f
Using the above highlights, the prolog rule would be
grandfather(X,Y) :-
mother(M,Y), father(X,M);
father(F,Y), father(X,F)
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