The detectable influence of Oresme’s opinions concerning probability and incommensurability is almost zero. One of the few to know anything about them is Gerson (noted in chapter 4 as the inventor of the phrase “moral certainty”), who mentions that Oresme shows that questions of the commensurability of the heavenly motions and the influence of the stars are completely uncertain and can be discussed only in terms of “rhetorical probability.”
