In plantingas formulation there are, conceivably, all sorts of things a god can't do or can't know. I understand that in your (broadly..our) conception of omniscience and omnipotence any failure in any of these things would seem disqualifying - but that is a disagreement over definitions and not a logical fallacy - as you seem to have hit on.
It is actually is pretty easy to come up with a (so-called?) successful argument, especially with your own definitions though you do need a bit more than that. The fact that christianity has broadly failed..and for so long, and that the one it has cobbled together doesn't reflect the common sense use of terms or even the beliefs of the christian body is a sign of christian moral and intellectual decay more than anything else.
It is actually is pretty easy to come up with a (so-called?) successful argument, especially with your own definitions though you do need a bit more than that. The fact that christianity has broadly failed..and for so long, and that the one it has cobbled together doesn't reflect the common sense use of terms or even the beliefs of the christian body is a sign of christian moral and intellectual decay more than anything else.
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