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Thinkers such as Henri de Saint-Simon ( 1760 – 1825 ) , Pierre-Simon Laplace ( 1749 – 1827 ) and Auguste Comte ( 1798 – 1857 ) believed the scientific method , the circular dependence of theory and observation , must replace metaphysics in the history of thought .
 person: Henri de Saint-Simon; person: Pierre-Simon Laplace; person: Auguste Comte
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 person: Henri de Saint-Simon; person: Pierre-Simon Laplace; person: Auguste Comte