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To learn by example is to submit to authority.  You follow your master because you trust his manner of doing things even when you cannot analyze and account in detail for its effectiveness.  
By watching the master and emulating his efforts…the student unconsciously picks up the rules of the art, including those which are not explicitly known to the master himself.
— Michael Polanyi (Hungarian born Professor of Physical Science - Theory of Knowledge and Structures of Tacit Knowing)