Without a valid medical you can talk all you like about aerodynamics because you sure as s--t ain't gonna be putting it into practice because your licence will be invalid therefore you will be flying illegally and your student, if they're unfortunate enough to have paid for instruction off you, has wasted their hard earned. Your sign off's will not be worth the paper they're written on, the insurance is invalid and well.... one could go on....
Your point is also valid cavortingcheetah but one wonders why Aviation Law is the first exam a student must pass. Any ideas?
Ah! Maybe now he/she understands my point... If not, just get back to reading AC Kermode whilst on your kermode and awaiting your case to come up.
VFE.