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Xavier Conlan - Hypotheses, facts, laws and… duration 9 minutes 6 seconds Xavier Conlan - Hypotheses, facts, laws and… Xavier Conlan - Hypotheses, facts, laws and theories - Clipped by Mark Richards	Xavier Conlan - Hypotheses, facts, laws and theories - Clipped by Mark Richards Xavier Conlan discusses Hypotheses, facts, laws and theories history philosophy science hypotheses facts laws theories theory xavier conlan sle209 From Mark Richards 5 plays 0 Type Learning Resources Language English