- it's a very simple device by which a person's ability to estimate effort is measured. That's his reason. (5203CM04B)
- effort plus intention is reason. Reason has to include the thought plus the effort. Thought plus effort is reason. (5203 CM06A)
- the ability to extrapolate new data from the existing data. Reason is hand in glove with self-determinism. The rehabilitation of a person's self-determinism is the rehabilitation of his ability to reason. (DAB, Vol. II, 1951-52, p. 70)