Adds a rule to the Adviser database
General Form: (defadvice rule-name term :rule-classes rule-classes)
When Adviser is first loaded, no rules are installed in its database, so it will never suggest any hints. To make Adviser useful, rules must be added to it using defadvice. In principle, many types of advice could be added to the Adviser service, and in the future other classes of advice might be added. But, for now, the only understood rule class is :pick-a-point.
See pick-a-point for documentation and examples about :pick-a-point rules.