 By the second quarter of the fourteenth century, modal logic had begun to change and new distinctions were used to develop the theory of the modal syllogism, such as the distinction between de dicto and de re modal sentences. Ockham was the first simply to abandon Aristotle’s theory in favor of a newer and more systematic account. He was not quite successful, however, and it was left to Buridan to subsume modal syllogistic as part of his larger project of systematizing the whole of logic.