It's amazing to me how some people even function! Recently, a friend of ours ordered a pizza from our local pizza place and listed the toppings he wanted for the girl waiting on him. Among them, he said he wanted "ground beef". She told him that he couldn't get "ground beef". (he, of course, knew he could) So, after arguing with him a bit, she proceeded to tell him the list of available toppings.....and, of course, one of them was hamburger. She had no clue that was ground beef.