Most of what we do to get people ready to act in situations of encounter consists of drilling these lists into them sufficiently deeply so that they will be evoked quickly at the time of the decision.

Creativity is no less challenging or exciting when the mystery is stripped from the creative process. The most beautiful flowers grow under careful cultivation from common soil.

The intelligent altruists, though less altruistic than unintelligent altruists, will be fitter than both unintelligent altruists and selfish individuals.

Human beings, viewed as behaving systems, are quite simple. The apparent complexity of our behavior over time is largely a reflection of the complexity of the environment in which we find ourselves.

The aim ... is to provide a clear and rigorous basis for determining when a causal ordering can be said to hold between two variables or groups of variables in a model . . . . The concepts refer to a model-a system of equations-and not to the 'real' world the model purports to describe.

All correct reasoning is a grand system of tautologies, but only God can make direct use of that fact

Learning is any change in a system that produces a more or less permanent change in its capacity for adapting to its environment.