Positivism is a theory of knowledge according to which the only kind of sound knowledge available to human kind is that if science grounded in observation.

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• Aristotle

  Philosopher

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

• Marcus Tullius Cicero

  Philosopher

  
  

• Carl Jung

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

• Friedrich Nietzsche

  Philologist

  Tuesday, Oct 15, 1844
  Saturday, Aug 25, 1900

• Martin Luther King, Jr.

  Civil Rights Activist

  Tuesday, Jan 15, 1929
  Thursday, Apr 04, 1968

• John Keats

  Poet

  Saturday, Oct 31, 1795
  Friday, Feb 23, 1821

• Soren Kierkegaard

  Philosopher

  Wednesday, May 05, 1813
  Sunday, Nov 11, 1855

• Billy Graham

  Evangelist

  Thursday, Nov 07, 1918
  

• Julius Caesar

  Roman Dictator

  Thursday, Jan 01, 1970
  

• Groucho Marx

  Comedian

  Thursday, Oct 02, 1890
  Friday, Aug 19, 1977

• Saint Augustine

  Saint

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

• John F. Kennedy

  35Th U.s. President

  Tuesday, May 29, 1917
  Friday, Nov 22, 1963

• Leonardo Da Vinci

  Painter

  Thursday, Apr 15, 1452
  Friday, May 02, 1519

• Carl Sagan

  Astronomer

  Friday, Nov 09, 1934
  Friday, Dec 20, 1996

• Ralph Waldo Emerson

  Essayist

  Wednesday, May 25, 1803
  Thursday, Apr 27, 1882