The "illusion of choice" argument doesn't say a choice doesn't occur; what it says is, whether you go to McDonald's or Taco Bell or choose not to eat at all, that even though you think that you have made a choice, in reality you haven't because no matter what you would've made the same choice. And if in a given situation there is a 100% likelihood that a specific choice is made by an individual, then there really was no choice. In others words, you may "choose" to go McDonald's for dinner, but if it was inevitable that you were going to McDonald's (you craved a big mac, or you have a positive association with McDonald's from when you're a kid that you unconsciously hope will counteract your bad day at work, etc) what you really have is the illusion of choice. You *think* you had the Free Will to choose where you were going for dinner, but in reality, no matter what, you were going to go to McD's.