But there are many chances for error in this process; for instance, I might say: "To call you an animal would be to state the truth"—to which you would agree; and, "To call you an ass would be to call you an animal"—to which you would also agree; from which I might conclude that, "To call you an ass would be to state the truth"—which you might have a vague idea was not true. If you wish to be sure that this conclusion is incorrect, you must be able to show just why it is incorrect. The study of logic would enable you to see just where the error lies. You must not be governed by vague ideas, or
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