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Seek as accurate an understanding of reality as possible, guarding against false beliefs.

Question the claims of authorities and widely held beliefs.

Do not become polarized or emotionally attached to any viewpoint.

Subjective judgments may seem to be based on our own experience but may in fact be based on what we have been told or on our expectations.

Always judge a course of action in comparison to its alternatives.

Base opinions on measurements wherever possible.

Use calculations rather than intuitive judgments when very large or very small quantities are involved.

Vague claims are usually worthless.

Never form a strong opinion after hearing only one side of a controversy.

A person can be highly intelligent, sane, and honest and still be totally wrong.

Correlation does not imply causation.

Beware of shortcuts to the truth.