sentence1: 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.
sentence2: It's as if the author replaced the explanation for infer/imply with their own rant against anyone who would dare to look it up in the first place and false is not true .