I apologize if this should be posted elsewhere, but I was impressed with the answers to some other physics questions I had after doing a Google search, so I thought this would be a good place to begin. I apologize for my elementary understanding. I wouldn't mind some guidance to other sources of information related to my question. My question stems from a class discussion during a logic class where the instructor stated that a fly is either ON the car antennae or OFF the car antennae. My contention with him was that there must be some sort of transitional state where the fly is either ON and OFF simultaneously or neither ON nor OFF. My instructor asked what I would base such a position on and I responded "quantum physics" despite my utter lack of knowledge in the field. He said that we could discuss "quantum physics" some other day. My question is, can a fly ever be in a state where it is both "ON and OFF" or neither "ON nor OFF" in relationship to a car antennae? Wouldn't there need to be a transitional state (for example, when the fly is leaving the antennae) where it is both ON and OFF? I'll leave it at that... Thanks!