When we teach without being asked, we are saying, in effect…
When we teach without being asked, we are saying, in effect, "You're not smart enough to know that you should know this, and not smart enough to
learn it."
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For the same reason, a question to the wise, if it is a probing question,
a quiz, and not a true request for information, is often just as infuriating,
because it implies, insultingly, that the person quizzed doesn't know the
answer.