Knowledge is know-how or a familiarity with how to do something that enables a person to perform a specialized task (Dixon 2000). It may also be an accumulation of facts, procedural rules, or heuristics (Dixon 2000).
A fact is a statement of some element of truth about a subject matter or a domain. For example, the sun rises in the east and sets in the west are facts.
A procedural rule is a rule that describes a sequence of relations relative to the main. For example, if the gas gauge indicates less than a quarter of a tank of gas, look for a gasoline station.
A heuristic is a rule of thumbs based on years of experience. For example, if a person drives no more than 5 kilometers above the speed limit, then that person is not likely to be stopped for speeding.
Dixon, NM 2000, Common knowledge:how companies thrive by sharing what they know, Harvard Business School Press, Boston.