Yes, I know. My point was not that people should believe irrational things. My point was that you ought to cease your leap from “X is irrational to believe” to “X is false”. They are two different arguments altogether, requiring different kinds of support.
So when you say “God doesn’t exist”, you really mean “God might exist, but I don’t think He does”. I don’t see how it’s my responsibility to know something like that. I’ll accept, though, that you’re conceeding God might exist, and we’ll move on to dicussing the rationality of believing in Him.
Remember, you're dealing with a once-born Christian, not a twice-born. Ask me how I [i]came[/i] to these conclusions, and you'll get a very unsatisfactory answer like, "My mommy told me so". Ask me instead, why I [i]still[/i] believe these things, and you'll get something more palpable.
I still believe that God is omnipotent because of simplicity- distinguishing between an omnipotent GOd who created everything and a merely extremely powerful God who created everything seems arbitrary. The first is more simple, and I've seen no compelling argument that there are specific capabilities beyond God, other than the logically impossible.
Omniscience seems to flow from omnipotence- it's difficult to see how a Being could be as powerful as possible without having as much knowledge as possible.
Omnibenevolence is a bit trickier- to say that God was morally culpable sometimes would imply a moral standard to which God was beholden, and I've never seen an argument for something like that.
The arguments do not use different definitions for God. Rather, they each focus on a different property which God is alleged to posses, and attempt to show that there is something that has that property.
I certainly agree with that.