Complex sentence: The historian Peter Gay, writing in'(1988), credited Grünbaum with discrediting Popper's argument that psychoanalysis is a pseudoscience, while the philosopher Michael Ruse, writing in'(1988), found Grünbaum's discussion of Popper to be definitive.
Split into simpler sentences: The historian Peter Gay, writing in'(1988), credited Grünbaum with discrediting Popper's argument that psychoanalysis is a pseudoscience. The philosopher Michael Ruse, writing in'(1988), found Grünbaum's discussion of Popper to be definitive.