This question was inspired by watching one of the Pirates of the Caribbean movies; particularly where Jack Sparrow allegedly survives on a desert island by finding an unlimited supply of rum. I've heard alcoholic drinks dehydrate you more than hydrate you, so this seems like an unsustainable strategy.
My question is threefold.
- How long can a human survive by drinking hard liquor (40% alcohol by volume) for their sole water intake (ignoring food)?
- If it's unsustainable, what will finally take you down?
- If the hard-liquor approach isn't viable, what % alcohol can keep you hydrated (beer, wine, etc.)?