I went about it, as in all things, systematically. I gave her a course in logic. It happened that I, as a law student, was taking a course in logic myself, so I had all the facts at my fingertips. “Poll’,” I said to her when I picked her up on our next date, “tonight we are going over to the Knoll and talk.”
“Oo, terrif,” she replied. One thing I will say for this girl: you would go far to find another so agreeable.
We went to the Knoll, the campus trysting place, and we sat down under an old oak, and she looked at me expectantly. “What are we going to talk about?” she asked.
She thought this over for a minute and decided she liked it. “Magnif,” she said.
“Logic,” I said, clearing my throat, “is the science of thinking. Before we can think correctly, we must first learn to recognize the common fallacies of logic. These we will take up tonight.”
“Wow-dow!” she cried, clapping her hands delightedly.
I winced, but went bravely on. “First let us examine the fallacy called Dicto Simpliciter.”
“By all means,” she urged, batting her lashes eagerly.
“Dicto Simpliciter means an argument based on an unqualified generalization. For example: Exercise is good. Therefore everybody should exercise.”
“I agree,” said Polly earnestly. “I mean exercise is wonderful. I mean it builds the body and everything.”
“Polly,” I said gently, “the argument is a fallacy. Exercise is good is an unqualified generalization. For instance, if you have heart disease, exercise is bad, not good. Many people are ordered by their doctors not to exercise. You must qualify the generalization. You must say exercise is usually good, or exercise is good for most people. Otherwise you have committed a Dicto Simpliciter. Do you see?”