Improving Our Talking Life : Page 22

Generally it is the people with the higher native intelligence, in the army those with the highest army classification scores, who have the keener and wider interests and the richer grip on their subjects. The level of intelligence tends to produce a corresponding level of grasp and variety for all topics of conversation. It is probably true that no satisfactory conversational rapport or affinity is possible between people of widely separated intelligence levels. Genius and moron would seem never to be conversationally compatible. A two horsepower mind can probably never develop sufficient range and depth to stimulate a six horsepower one. Friendship between people so divergent in talents is never likely to be conversationally stimulating enough to survive a common and specialized interest.