I strongly support abortion but this is the dumbest argument there is. You're just perscribing new meanings to the words alive and life that almost nobody shares with the subset of people who do this, which by the way excludes biologists. Abortions kill living human animals and there are many good reasons why abortions are justified, but not being alive isn't one of them. Everything that applies to a fetus also applies to a coma patient dependent on life support. If you want arguments that don't suck then look at bodily autonomy, health (including mental), self-defense, etc. instead of attempting to water down concepts to support your position. Seriously fallacious, sad to see it's so popular.