i've heard this debated a lot. in fact, we were talking about it at work this morning. at one point in my life i heard, for the amount of water that you need, take your body weight (pounds) and divide it by 2. that's how many ounces you need a day. when it comes to getting it from food or actually drinking water, im not sure it matters. but obviously you cant get all 64oz of water from eating fruits and veggies.