I once used that analogy and, at the end of the inspection, the agent asked me to show her where the tire was on the roof. . . I said something like, "I'm sorry. I didn't mean to say that there *was* a bald tire on the roof. Rather I was trying to explain that the worn shingles were *like* a bald tire in that neither could be relied upon to provide long term service." Of, course, she just screwed up her face, tilted her head, and said, "huh?" At that point, the buyer jumped in and helpfully explained, "He was making a simile. You know, like when someone says that you're as dumb as a post, they don't really mean that you're a post, just that you're as dumb as one." I took that as my cue to thank everyone and get the heck out of there. I don't get it. Is she or isn't she a post?