Well thats exactly why i think its irrelevent. i.e we should ban all knives as they can be misused, sorry but youll have to use your hands. That something can be misused, or that it "could" lead onto another subject thats not under discussion, well i dont see how its a "real" counter argument. pick ANY subject, and you can attribute the slippery slope arguement against it it, thats how i find it irrelevent. Yes, people are different, but if its causing enough pain that they want to end it, exactly why is that not enough of a definition of "agonizing pain"? If i stab someone and it hurts them, thats pain. If i stab someone on hard painkillers, it dosnt hurt them. Whats the difference? The individuals perception, if it hurts them, it hurts them. They could of course lie, but then if it isnt enough pain to make them want to die, exactly what would the motivation be? People are moved by different things, i dont understand why the term "suffering needlessly" isnt compelling, you do. Theres not really much to discuss about it I am uncompelled on your alternative means. Maybe someone dosnt want to live in a drug induced coma for the last few days, i see no medical or ethical reason to keep them going.