You don't count the sleeve of cookies (700kCal) and pint of milk (345kCal), or that bag of chips (900kCal), and the little snack bag and candy bar you got at the corner store (450kCal).  Plus a slimjim (180kCal) is meat so that doesn't count anyway.  And you were really hungry in the evening from not eating all day so you have a few twinkies, but you are on a diet so you only have 4 (600kCal).  And you get to have your 500kCal pre packaged meal in the middle of the day some time.  Whoops, 500kCal is actually 3675kCal.  When pressed you only admit to the bag of chips and then say to yourself 'well i still only had 1200kCal and some twinkies'