Evil? -- No Problem

In sections X and XI, Philo and Demea catalogue human misery and Philo uses this evidence to prove that either God does NOT exist or He is NOT benevolent. Is this argument sound? If not, where does the argument fail? What about the possibility that suffering is part of some great good like free will or character development (a theodicy)?

No Brute Facts -- the Principle of Sufficient Reason

You are hiking in a remote wilderness, miles from the nearest building or even cell phone tower. You come upon a clearing and see a crystal sphere hovering over you and emitting colorful light pulses in some seeming order: red, blue, green and the pattern repeats. Should there be an explanation for this odd phenomenon or is it acceptable to shrug our shoulders and mutter "Stuff happens"? Can we extrapolate from this case to a general principle of the universe? If so, can we prove that God (or a reasonable facsimile) exists?

God -- Or Some Lesser Designer

In Chapter V, Philo devises several arguments that accept that the universe has a designer, but deny that that designer is God. Given our traditional definition that God is omnipotent, omniscient, and omnibenevolent, is Philo correct? Or is there a response to his arguments? Does it matter if the designer is the traditional God?