Four principles of decision making

1. Only certainty is that there is no certainty.
2. Every decision is a matter of weighing probabilities.
3. Despite uncertainty we must decide and we must act.
4. We need to judge decisions not only on the results, but on how they were made.

"Reject absolute answers and recognize uncertainty. Weigh the probabilities. Don't let uncertainty paralyze you."

- 70th Treasury Secretary Robert E. Rubin. May 1999.