Taken from official court records

Lawyer: "Doctor, before you performed the autopsy, did you check for a pulse?"
Witness: "No."
Lawyer: "Did you check for blood pressure?"
Witness: "No."
Lawyer: "Did you check for breathing?"
Witness: "No."
Lawyer: "So, then it is possible that the patient was alive when you began the autopsy?"
Witness: "No."
Lawyer: "How can you be so sure, Doctor?"
Witness: "Because his brain was sitting on my desk in a jar."
Lawyer: "But could the patient have still been alive nevertheless?"
Witness: "Yes, it is possible that he could have been alive and practicing law somewhere."