Did you read his article and looked at what you're referencing? From the website you're referencing: > Adequate Intakes (AI) have been defined derived from a

Did you read his article and looked at what you're referencing? From the website you're referencing: > Adequate Intakes (AI) have been defined derived from a combination of observed intakes in population groups with desirable osmolarity values of urine and desirable water volumes per energy unit consumed. The article attacks exactly that line of reasoning: > I’m a pediatrician, and I can tell you that I have rarely, if ever, used urine osmolality as the means by which I decide if a child is dehydrated. When I asked colleagues, none thought 800 mOsm/kg was the value at which they’d be concerned. More importantly, intake of water != drinking water. 95% of lettuce is water, on the extreme end, but it's not unique. 90% holds for carrots or beets, too. For potatoes it's about 70 to 80%. And when cooked, it soaks up even more water. That adds up quickly and severely reduces the amount of glasses of water you actually need to drink. After all, 2.5 litres of water would easily amount to (over) 8 cups/glasses of water. The article attacks exactly that notion.