Science cannot progress without reliable and accurate measurement of what it is you are trying to study. The key is measurement, simple as that.

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• Henry David Thoreau

  Author

  Saturday, Jul 12, 1817
  Tuesday, May 06, 1862

• George Bernard Shaw

  Playwright

  Saturday, Jul 26, 1856
  Thursday, Nov 02, 1950

• John Muir

  Author

  Saturday, Apr 21, 1838
  Thursday, Dec 24, 1914

• Sun Tzu

  Strategist

  Thursday, Jan 01, 1970
  Thursday, Jan 01, 1970

• Saint Augustine

  Saint

  Saturday, Nov 13, 0354
  Wednesday, Aug 28, 0430

• Martin Luther

  Monk

  Saturday, Nov 10, 1483
  Monday, Feb 18, 1546

• Billy Graham

  Professional Wrestler

  Monday, Jun 07, 1943
  

• Francis Of Assisi

  Saint

  Thursday, Jun 24, 1182
  Saturday, Oct 03, 1226

• Les Brown

  Author

  Saturday, Feb 17, 1945
  

• Helen Keller

  Author

  Sunday, Jun 27, 1880
  Saturday, Jun 01, 1968

• Carl Jung

  Psychiatrist

  Monday, Jul 26, 1875
  Tuesday, Jun 06, 1961

• Pope John Paul Ii

  Priest

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

• Samuel Taylor Coleridge

  Poet

  Wednesday, Oct 21, 1772
  Friday, Jul 25, 1834

• George Orwell

  Novelist

  Thursday, Jun 25, 1903
  Saturday, Jan 21, 1950

• Peter Drucker

  Author

  Friday, Nov 19, 1909
  Friday, Nov 11, 2005