That has always been the conventional wisdom, but who can
say?
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false
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Conventional wisdom is an accepted opinion, belief or judgement.
For example, 'A book should never be judged by its cover' or - 'a
film can not succeed unless it stars a famous actor.' or 'if you
work hard you will succeed'.
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The conventional wisdom is: If you can't stand the heat, you get
out of the kitchen.