"reports from a brain scan that supposedly indicated that Terri's brain had atrophied to 20% of its original size "
Good point. Even after two weeks of dehydration, her brain was still half the size of a normal brain.
The brain doesn't loose fluid even if you die of dehydration. it's a well know fact, so that "theory" is bogus.
No. It was half the weight of a normal brain. Not the same thing.