Q. Doctor, before you performed the post mortem, did you check the pulse?
A. No
Q. Did you check the breathing?
A. No
Q. Did you check the blood pressure?
A. No
Q. Then might it be possible that the patient was still alive?
A. No
Q. How can you be sure, Doctor?
A. Because his brain was sitting in a jar on my desk.
Q. But could he have been alive nevertheless?
A. It is possible that he could have been alive and practising law somewhere.
This is my favorite. A couple of the others actually do make sense.