Creating something you cannot lift is only possible when you are not omnipotent. Because they can do anything, that would mean suggesting they do something that is caused outside of the realms of reality as I have stated.
Well, I think if we can extrapolate the definition of omnipotent to mean simply: can do anything. Then, given that what we are asking the omnipotent being to do something, he is clearly not omnipotent. While I can see where you are coming from, in asking an entity that exists outside the realm of reality to do something consistent within the realm of reality is a bit frivolous in itself, it would be a more precise definition to say that they can do a lot of things, as opposed to everything.
It's a bit like saying that, assuming you have a square circle, given that it is a shape, and all shapes can be made to be 3 dimensional, can you make this square circle 3D. While yes, you can make any shape 3D, you cannot possibly have a square circle to begin with, much like you cannot have an omnipotent being.
I think a better situation for my explanation would be this:
Bob can lift the weight of everything within the universe but nothing more. (The universe will be a metaphor for the realm of reality). Now, Bob would not be able to lift it if you added even one more pound but because nothing (That we know of hence why this is a flawed situation because I don't necessarily 'know' we will assume the universe is everything) exists outside of the universe, that fact is pointless. He still in essence can lift any weight.
Let's say the Universe weighed 1kg. If you then asked Bob to lift 2kg, he would say no. This does not negate the first premise however. You've qualified what Bob can do:
Bob can lift the weight of everything, WITHIN THE UNIVERSE. As opposed to:
An omnipotent being can do everything. You haven't asked for a task outside of it's scope, everything means anything.
Now if you apply this to an omnipotent god, then you wouldn't be able to have him create something so heavy he can't even lift it because the fact he is omnipotent will override this statement every time. Because he is omnipotent he is unable to negate that fact meaning creating something he cannot lift would be outside the realms of reality and possibility.
Since there is an unavoidable contradiction, you can simply conclude that therefore there cannot be an omnipotent being, and thus, not an omnipotent God. Since reality has no contradictions (law of non-contradiction) any being that seems to contradict itself is a product of imagination.
Unless ofcourse you were to make the argument the said 'god' was to make a human version of himself that was weak and couldn't lift anything....hm....oh well a topic for another date.
I'd apply the law of identity there. You will still need to answer the question, can this entity perform that task. The entity cannot both perform, and not perform the task (Law of excluded middle).
The only problem with your scenario that I can find is that your comparing a human (limited) to someone who is omnipotent (limitless) within the same idea.
Something that is infinite cannot possibly exist in a finite world, for which we reside in. It is therefore deducible that this omnipotent being simply doesn't exist.
If we were to really abide by the point of this thread, then the simple answer would be yes, but we don't know how.
