In logic, he was an Aristotelian nominalist ; in natural philosophy, an empiricist. He applied a synthesis of the new 14th century physics of Buridan, Thomas Bradwardine and Oresme in his commentaries on Aristotle. Both his theological and philosophical works are characterized by a logico- semantical approach in which he followed Buridan, combined with an eclectic use of older theories, sometimes more Aristotelian and sometimes more Neoplatonist ; this fact that renders narrow the label " Ockhamist " often applied to Marsilius.