Abstract

This chapter delves into several texts from the quodlibetal materials preserved in codex MS Praha, KMK, L 45, generally taken as connected with Matthias of Knín’s 1409 quodlibet, namely those dealing with sensory perception, especially vision, and light phenomena, such as the rainbow. It is argued that some of these materials are textually dependent on what was popular at the Prague Faculty of Arts, such as works by Albert the Great, Robert Grosseteste, Nicole Oresme, and Themo Judaei. These textual dependencies, especially many complex arguments copied from the source texts, corroborate the standard understanding of the materials preserved in MS Praha, KMK, L 45, as products of textual copying in a scriptorium (as opposed to written reports of spoken argumentation in an auditorium).