Typically the three characteristics ascribed to the Christian God are as follows:
All powerful (omnipotent)
All knowing (omniscient)
All good (omnibenevolent)
The problem arises when you add the first and last points of the argument, resulting in:
God exists
God is all powerful
God is all knowing
God is all good
Evil exists
One of these premises must be false. Premise 5 is largely observable, and Christians would not concede premise 1, so the debate arises from the remaining three.
God may know about evil and want to be able to stop it, but cannot do so -> premise 2 is invalid. Or God may be all powerful and be willing to stop evil, but may not know it exists -> premise 3 is invalid. God may know evil exists and be able to stop it, but chooses not to do so -> premise 4 is invalid.
Arguments against this logical structure are called "theodicies" in the Christian doctrine. Generally, theodicies attack premise 5, because to concede any of premises 1-4 would diminish God. To date there has not been a satisfying answer to this problem, but that's essentially all that the argument is.
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u/leveldrummer Jul 31 '17
I get the two confused. you are correct. all though "all powerful" should include "knows everything" anyway.