Basic Questions on Prolog

A goal is a statement that we are trying to prove whether or not it is True or False.

Prolog is a logic programming language widely used for __________________.

There are three basic constructs in Prolog: facts, rules and clauses.

A fact is written as "capitalCity(Paris)." returns error. Why is that?

:- in a rule means

Backtracking is going back to a previously found successful match in order to continue a search. 

An example of rule can be father(X):- parent (X,Y) and male(X).

...................... is a program referred to as Declarative programming language.

Which of the answers below cannot be used in a knowledge base for a music class?

Binding a variable to a value during resolution, lasting only long enough to satisfy one complete goal is called ______.