Here's a challenge posed at Infidels.org, a big online resource for the skeptical community:  

"Can God know what it is like to learn? If God is omniscient (all-knowing), then it seems that he would have to know what it is like to learn. However, in order to know what it is like to learn, one must have learned something, which involves moving from a state of not-knowing to a state of knowing. This entails that at one time we were in a state of not-knowing a thing that was learned, then experienced what it is like to learn. But if God is essentially omniscient, he always is and has been omniscient, so was never in a state of not-knowing. Because being in a state of not-knowing is necessary to know what it is like to learn, we would seem to have to say that God does not know what it is like to learn. But this contradicts the original claim that he does know this based on his omniscience. Thus, it seems that God's omniscience generates a contradiction. Consequently an omniscient God cannot exist."

 Tough challenge.  How would you answer?  Here are my thoughts (in video form!):