It’s Impossible to Know Both the Position and the Velocity of Caesar Dressing

Old woman: I bought this Caesar salad, but I don’t know where to get the dressing. Please, can you tell me where I can get some dressing?
Cute girl: Ummm, I don’t know. I’ve never had a salad here before.
Old woman: But where do you think the dressing could be?
Cute girl: Well, possibly in the refrigerator over there… where they keep the drinks?
Old woman: Are you sure?
Cute girl: Well, that’s my hypothesis, but it hasn’t been tested.

–Le Pain Quotidien, 58th & 7th