 Evaluations of Arnauld’s work as a theologian vary. Ian Hacking, for example, says that Arnauld was “perhaps the most brilliant theologian of his time” (Hacking 1975a, 25). Ronald Knox, on the other hand, says, “It was the fashion among the Jansenists to represent Antoine Arnauld as a great theologian; he should be remembered, rather as a great controversialist… A theologian by trade, Arnauld was a barrister by instinct” (Knox 1950, 196). It is agreed on all sides, however, that Arnauld was acute and learned in theology as well as in philosophy.