Looking Dumb

Lee has been carrying around the Cabela's master catalog for quite some time searching for the perfect knife to purchase. Yesterday he was on the couch, with ruler in hand, paging through the knife section carefully running his finger along the ruler until he arrived at the said length of blade. Every once in a while an "oh, that's a big one" and "too little" was mumbled. After finding the perfect one for that day he came over to me and said, "I think this one with the serrated knife, you know what serrated means?" I said, "yes I know". "I think this one will work well for cutting brush". I hope I'm not as dumb as I look to a 7 year old.