I guess to accept the story line, you have to accept the fact that a person can lose the will to live. If a person is close to death and pretty much can go either way (50/50 chance of living or dying).. does a person have the ability to just give up on life.. or do they survive based strictly on health reasons irregardless as to their depression?
I think a person can lose the will to "fight" for life. I think a person can tip the scales of survival if they have it in them to survive at all costs. Take that "will to survive" away and that 50/50 ratio can slant a bit...