Question 6911 – Artificial-Intelligence

Given the following set of prolog clauses : 

father(X, Y) : 

parent(X, Y), 

male(X), 

parent(Sally, Bob), 

parent(Jim, Bob), 

parent(Alice, Jane), 

parent(Thomas, Jane), 

male(Bob), 

male(Jim), 

female(Salley), 

female(Alice). 

How many atoms are matched to the variable ‘X’ before the query father(X, Jane) reports a Result ?

Correct Answer: E