Your body must regulate ion levels - sodium, potassium, calcium, magnesium, etc. Drinking pure water in excess will force you to produce urine, and when you take a piss, you’ll lose some of those ions with it. Big, big problem. That’s why you need salt in your diet.
There's no way I'd send my kids to Harvard or MIT (or Stanford, Caltech, Yale, Princeton, etc. etc.) if I were a foreigner. Shit, I am an American and I think I'd probably prefer to send my kids to McGill at this point. I hope my outlook changes. And I write this as someone who has walked the halls of two of those prestigious universities.
El fucky