Right. So if I call a doctor and say I'm having a heart attack, he'll just scratch his head and say, "Those words mean nothing to me. Never heard of such a thing." So, why did my father's doctor last year tell him he had a heart attack? Was he just messing with him?
VN_Survivor_67-68 is setting up a classic straw man. He's seizing on the fact that there is no formal medical definition of something called a "heart attack". By suggesting that since you aren't using the term "myocardial infarction" your argument is wrong, he is simply betraying the fact that he has no argument of his own.