We saw that self-control rests ultimately with the environmental variables which generate controlling behavior and, therefore, originates outside the organism. There is a parallel issue in the field of ideas. 【254頁】
われわれは、セルフコントロールは究極的にコントロールする行動を生じさせる環境変数次第であること、つまり生活体の外側に生じる環境変数次第であることを述べてきた。アイディアの領域にも、同じような問題が存在している。【藤本訳、301頁】

• 明らかな模倣（obviously imitative）
• 音声や文字による教示に従う反応（controlled by explicit verbal stimuli, as in following spoken or written instructions）
• 所定の数学的演算（routine mathematical operations)
• 公式の演繹的適用（the use of syllogistic formulae）

So long as originality is identified with spontaneity or an absence of lawfulness in behavior, it appears to be a hopeless task to teach a man to be original or to influence his process of thinking in any important way. The present analysis should lead to an improvement in educational practices. If our account of thinking is essentially correct, there is no reason why we cannot teach a man how to think. There is also no reason why we cannot greatly improve methods of thinking to utilize the full potentialities of the thinking organism − whether this is the individual or the organized group or, indeed, the highly complex mechanical device.