Telephone Books Are Like Dictionaries -- If You Know The Answer Before You Look It Up, You Can Eventually Reaffirm What You Thought You Knew But Weren't Sure.

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Telephone books are like dictionaries -- if you know the answer
before you look it up, you can eventually reaffirm what you
thought you knew but weren't sure. But if you're searching for
something you don't already know, your fingers could walk
themselves to death.
-- Erma Bombeck

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