For serious educators

Confucious say - When words lose their meanings, people will lose their liberty.

Science is based on the process of discrimination, with choice being limited to control the terms for the variables available for study to be the focus of the actual physical change. Biologists are still collating information on what biology is, but chemistry and physics both rely on isolating circumstance to allow the only path that we set to discriminate the variables.

Goslin's read here has a marvelous mechanism for opening students minds to thought.