A cop pulls a car over, and after looking at the driver's license says "Dr. Schroedinger, I noticed you were driving erratically. Do you mind if I search your car?"
Dr. Schroedinger gives him permission.
After searching, he comes back to the driver's window.
"Dr. Schroedinger, are you aware that there's a dead cat in your boot?"
Dr. Schroedinger says,