1. Governed by, or showing evidence of, clear and sensible thinking and judgment, based on reason rather than emotion or prejudice. 2. Able to think clearly and sensibly, because the mind is not impaired by physical or mental condition, violent emotion, or prejudice. 3. Presented or understandable in terms that accord with reason and logic or with scientific knowledge and are not based on appeals to emotion or, prejudice. 4. Endowed with the ability to reason, as opposed to being
governed solely by instinct and appetite.