If there are four equations and only three variables, and no one of the equations is derivable from the others by algebraic manipulation then there is another variable missing.

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• Abraham Lincoln

  16Th U.S. President

  Sunday, Feb 12, 1809
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• Johann Wolfgang Von Goethe

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• Thomas Jefferson

  3Rd US President

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  Tuesday, Jul 04, 1826

• John Lewis

  U.s. Representative

  Wednesday, Feb 21, 1940
  

• Winston Churchill

  Former Prime Minister Of The United Kingdom

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  Sunday, Jan 24, 1965

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• Maya Angelou

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• Will Rogers

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• Charles Spurgeon

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  Sunday, Jan 31, 1892

• W. Edwards Deming

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• Zig Ziglar

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• Napoleon Hill

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  Friday, Oct 26, 1883
  Sunday, Nov 08, 1970

• Vincent Van Gogh

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  Wednesday, Mar 30, 1853
  Tuesday, Jul 29, 1890

• Pope John Paul Ii

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  Tuesday, May 18, 1920
  Saturday, Apr 02, 2005