Prolog predicates

问题:

I am currently learning about predicate logic in Prolog. I am having trouble answering a question on the topic and would like to know the steps one one take to solve such a question using Prolog predicates. I have a scenario which must be represented in Prolog predicates using only two different predicate names.

1. A and B are married
2. B likes C
3. C and D are married
4. D likes E
5. F likes B
6. E likes B
7. E and G are married
8. A likes G

回答1:

Just write down what it says.

are_married(a,b).

likes(b,c).

And so on. We've used two names of predicates so far.

In Prolog, atoms are denoted by identifiers starting with a lower case letter. Identifiers starting with an upper case letter or an underscore _ denote logical variables.