Could God create a rock so heavy He could not lift it?

Have you ever had a skeptic ask you that question? Some throw it out like a trump card that they think proves Christianity wrong (kind of like Why did God allow evil to come into the world?). Gotquestons.org has a very good article that address this very question. Below is the link and an excerpt.

This question is frequently asked by skeptics of God, the Bible, Christianity, etc. If God can create a rock that He cannot lift, then God is not omnipotent. If God cannot create a rock so heavy that He cannot lift it, then God is not omnipotent. According to this argument, omnipotence is self-contradictory. Therefore, God cannot be omnipotent. So, the question, could God create a rock so heavy He could not lift it? The quick answer is "No." But the explanation is far more important to understand than the answer... (Read more)