That Quantity Which, When Multiplied By, Divided By, Added To, Or Subtracted From The Answer You Get, Gives You The Answer You Should Have Gotten.

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That quantity which, when multiplied by, divided by, added to,
or subtracted from the answer you get, gives you the answer you
should have gotten.
-- Skinner's Constant (or Flannagan's Finagling Factor)

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