In arguing that God exists in Meditation III, Descartes relies on the premise, which he takes to
be clear and distinct, that the cause of an idea must have at least as much formal reality as the
idea itself has objective reality. First, state how this premise is used in the proof of God’s
existence. What is its significance? Second, consider why Descartes thinks this principle is true
(besides the fact that it’s clear and distinct). You may want to discuss what the precise nature of
objective reality is. Finally, state what you take to be the best objection to this principle. How
would Descartes respond to this objection? Would his response be adequate?