I'm really late with this, but a while back you replied to a thread discussing Aerith's death (and yes, that is the proper official spelling of her name). As an aside to what you were saying, in game terminology the Phoenix Down "revives" your "dead" party members. However, in the actual reality of the FF7 universe, it's highly unlikely that death is not final. Therefore, the Phoenix Down is likely more of an item to revive an unconscious comrade. In other words, if they were unconscious, a simple potion wouldn't work because they wouldn't simply be weak from being low on health. In every FF7 media other than this game, death has been portrayed as final, such as in Crisis Core, where Zack fights alone. When he dies, it's game over.