A scientist is never certain. ... We absolutely must leave room for doubt or there is no progress and there is no learning.

Picture Quotes Maker

Top Authors

• Will Rogers

  Actor

  Tuesday, Nov 04, 1879
  Thursday, Aug 15, 1935

• Tyler, The Creator

  Rapper

  Wednesday, Mar 06, 1991
  

• Carrie Fisher

  Actress

  Sunday, Oct 21, 1956
  Tuesday, Dec 27, 2016

• Dolly Parton

  Singer-Songwriter

  Saturday, Jan 19, 1946
  

• Ronald Reagan

  40Th US President

  Monday, Feb 06, 1911
  Saturday, Jun 05, 2004

• Peter Drucker

  Author

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

• John Keats

  Poet

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

• George Carlin

  Comedian

  Wednesday, May 12, 1937
  Sunday, Jun 22, 2008

• Walt Whitman

  Poet

  Monday, May 31, 1819
  Saturday, Mar 26, 1892

• Aristotle

  Philosopher

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

• Barack Obama

  44Th U.s. President

  Friday, Aug 04, 1961
  

• Voltaire

  Writer

  Sunday, Nov 21, 1694
  Saturday, May 30, 1778

• Dwight D. Eisenhower

  34Th U.s. President

  Tuesday, Oct 14, 1890
  Friday, Mar 28, 1969

• Robin Williams

  Actor

  Saturday, Jul 21, 1951
  Monday, Aug 11, 2014

• John Locke

  Philosopher

  Sunday, Aug 29, 1632
  Tuesday, Oct 28, 1704