Among the large numbers of rules generated, many that are derived will be useless as they summarize common knowledge about the business. They are called trivial rules. Even if the confidence in the trivial rules is high, they remain useless and cannot be used for any data-driven decision making. We can safely ignore all trivial rules.

The following are examples of trivial rules:

• Anyone who jumps from a high-rise building is likely to die.
• Working harder leads to better scores in exams.
• The sales of heaters increase as the temperature drops
• Driving a car over the speed limit on a highway leads to a higher chance of an accident.