Complex sentence: David Kelley (born June 23,1949) is an American philosopher, author, and advocate of Objectivism, though his position that Objectivism can be revised and influenced by other schools of thought has prompted disagreements with other Objectivists.
Split into simpler sentences: David Kelley (born June 23,1949) is an American philosopher. He is an Objectivist, though his position that Objectivism can be revised and influenced by other schools of thought has prompted disagreements with other Objectivists.