Again, deliberately disingenuous.Let's test it. We will have damo hang out at hospitals for someone to become brain dead. We'll dress him in doctor's gear so he looks all official. Then he can point to a body while saying to the family, "still alive." I will do the same with any group of scientist, except I will say "dead." Let's then find out who was confused. Who do you think it will be?
Again, you conveniently "forget" the difference between living person and alive. Everybody can see the body still breathes, the job of the doctor is to inform whether the person still is, not just that the organism still lives.
Scientists are careful in their language, they would say "brain-dead".