Ideas can only be adventitious/fictitious/innate, I have an imperfect & finite mind, I have an idea of a perfect & infinite being (god), imperfect finite mind cannot come up with that so not fictitious, we live in an imperfect & finite world therefore we cannot experienced god in the world so not adventitious, god must be innate, the cause of an effect must be as real as the effect, our idea of god is real so the cause is also real and the only cause can be god. GOD IS THE CAUSE OF GOD
Cartesian circle: 1) God exists and isn't a deceiver because I perceive it clearly and distinctly 2) Clear and distinct ideas can be trusted as truths because God would not allow me to be mistaken by them
not a strong argument as it ASSUMES clear and distinct ideas are true in order to assert that they are true