Take the following as truth: It is as if you looked up, say, infer/imply in a usage manual and the author's treatment, in place of an explanation and sound advice, were an unpleasant diatribe against anyone so dense and rude as to have had to look up the entry to begin with.
Then the following statement: "Replacing the explanation with the author's diatribe would only work in textbooks written by famous professors." is true, false, or inconclusive?
Answer: Inconclusive