Deliberate Idea -Finding; p.134

"Charles Kettering told about a man who came to see his new Diesel engine. "I would like to talk to your thermodynamics expert about it," said the visitor, "I am sorry," Kettering replied, "we don't have anyone here who even understands the word 'thermodynamics,' much less is an expert on it. But if you want to know how we developed this engine, I'll be glad to show you."