No one can survive 63 days without food or water. It is an impossibility. Remember how long Terri S. lasted?
Terri Schiavo was sick already. You can live (barely) by drinking your own urine. Besides if you have the will to live, you'd be surprised. I don't think Terri had any will because the people that surrounded her wanted her to die.
Terri was deprived of food AND water...makes a HUGE difference. I think CindyDawg was right.