I'm also probably a lot smarter than you.  I know that sounds arrogant but if it's true who cares?  I judge arguments based upon their truth-value rather than how they are perceived by others (particularly the perceptions of people I deem to be unintelligent).  It's very insensitive, but at least I'm honest.  It's not as though you were being nice to me in the first place.

Seriously, if you believe a Kangaroo hopped 7,776 miles from Mt. Ararat to Australia, while picking up the bones of whoever died along the way so as not to leave a single shred of evidence in the archaeological record of Kangaroos ever having lived anywhere outside of Australia, it's perfectly normal and reasonable for me to assume that I'm probably more intelligent than you.  It may sound arrogant, but it's still a reasonable assumption. 

Also, the Earth is billions of years old, not thousands.   Even my 7 year old son knows that, and yes I do read the Bible to him, but I also read science books to him.