Jan: A bit of a tangent, but I found your claim that you just magically know that you're not a brain in a vat interesting. It seems to me that this is just a faith-based statement you are making, similar to most of the statements you make about your God. I also find it interesting that you claim that there is no need for you to "prove" these things. That is, you are expressing that you are content to believe what you believe largely without evidence. Emotionally, this is fine. Whatever floats your boat is good for you. Your mistake is in making false claims to knowledge. I think that you often confuse your faith with actual knowledge.