Complex sentence: Raymond Oenbring, a doctorate in the rhetoric of science, thinks that Chomsky "overstates the novelty" of transformational rules "seems to take all the credit for them" even though a version of them had already been introduced by Zellig Harris in a previous work.
Split into simpler sentences: Raymond Oenbring, a doctorate in the rhetoric of science, thinks that Chomsky "overstates the novelty" of transformational rules. He "seems to take all the credit for them" even though a version of them had already been introduced by Zellig Harris in a previous work.