Yeah, I would cross-examine that "all" as well. But LW is talking about "close friends" not friends in general, so 3 or 4 would be plenty, right? Over that, it becomes "friends" without the "close" qualifier, but I am an introvert, so maybe extroverts would calibrate much differently. But how close can you be to 10 people, really! *she exclaims with introverted disbelief* But there's no point in devising advice if you assume that all these letter writers are unreliable narrators, so I just went with it.