It begins by stating Russell Ackoff's theory of the five categories of the human mind:
1. Data: symbols
2. Information: data that are processed to be useful; provides answers to "who", "what", "where", and "when" questions
3. Knowledge: application of data and information; answers "how" questions
4. Understanding: appreciation of "why"
5. Wisdom: evaluated understanding.
Read the article for an elaboration on these concepts.
