It makes no sense to seek a single best way to represent knowledge-because each particular form of expression also brings its particular limitations. For example, logic-based systems are very precise, but they make it hard to do reasoning with analogies. Similarly, statistical systems are useful for making predictions, but do not serve well to represent the reasons why those predictions are sometimes correct.

The Emotion Machine: Commonsense Thinking, Artificial Intelligence, and the Future of the Human Mind (ed. Simon and Schuster, 2007) - ISBN: 9780743276641