Discussion
What is a resolution refutation's relationship to backward chaining?
Answer: B
Working backwards from a negated goal, resolving against definite clauses, is exactly what backward chaining does, which is why Prolog is described as a resolution based language. The restriction to definite clauses is what makes the search linear rather than exploding. The other options misstate the relationship. Seeing two apparently different procedures as one restricted to a fragment is what allows results about the general case to be applied to the special one.
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