THE ARGUMENT FROM EVIL: INDUCTIVE VERSION
(1) If God exists, then He is omnipotent, omniscient, and all good.
(2) There is a tremendous amount of evil in the world, some of it not caused by human beings and apparently gratuitous. [Here might follow a long description of natural disasters, diseases afflicting the apparently innocent, and so on.]
(3) It is unlikely that such an amount and kind of evil would exist if there is an omnipotent, omniscient, and all good being.
(4) Probably, God does not exist.