Most North Americans know that human-caused global warming is real, even if political leaders don't always reflect or act on that knowledge.

Knowledge is what we get when an observer, preferably a scientifically trained observer, provides us with a copy of reality that we can all recognize.

This means that no single logic is strong enough to support the total construction of human knowledge.

The greatest sin is judgment without knowledge.

Knowledge of human nature is the beginning and end of political education.