... what are you talking about? Are you arguing the semantics of "save"? Bullet proof vests save lives... Polio vaccines save lives... Or is that just "extend

... what are you talking about? Are you arguing the semantics of "save"? Bullet proof vests save lives... Polio vaccines save lives... Or is that just "extending": "He was suppose to die with a bullet to the chest, so by stopping it, we extended his life"