The reason of the Islamic and Jewish Aristotelians for positing a single external Agent Intellect is that all (rational) human beings are considered by Aristotelians to possess or have access to a fixed and stable set of concepts, a unified correct knowledge of the universe. The only way that all human minds could possess the same correct knowledge is if they all had access to some central knowledge store, as terminals might have access to a mainframe computer . This mainframe is the Agent Intellect, the "mind" of the universe, which makes all other cognition possible.