 James’ most significant works written while in Paris are his four quodlibetal questions and thirty-four disputed questions on the categories as they pertain to divine matters (Quaestiones de praedicamentis in divinis), although five of them have actually nothing to do with theology or the categories, as they deal with the human will and the habits (see Ypma 1975 for a possible explanation regarding their inclusion in the Quaestiones). These two works constitute the most important sources for our knowledge of James’ philosophical thought.