Many theological terms such as ‘causation’ and ‘creation’ carried technical meanings during the late thirteenth century but these same terms are often treated commonly in modern discourse. When the tension between creationism and evolution is examined in light of what well known medieval theologians wrote, it appears that the current debates related to evolution often lapse into the fallacy of equivocation. One unfortunate consequence of this breakdown is that the root of the problem, the subtle language involved, often remains unexposed. Moreover, the level of passionate discourse surrounding evolution suggests that a nearly scholastic approach is required if further confusion is to be limited.