How do you know Terri's brain wasn't self aware? Are you her "self"?
I think your existence must be pure torture. Your testimony otherwise is just proof that your "self" is utterly deluded and can no longer be trusted to provide credible testimony about your true state.
Got a better standard for defining human life? Maybe "independence" or the ability to preserve the self? Any others?
I don't know that for sure - even though Doctors testified under oath that she was not self aware. But, I hope she was not self aware - how would you like to be trapped in a mostly non functioning body for years on end? Imagine being stuck in a (body) coffin, unable to move, unable to read, unable to communicate, etc. - would that not drive almost anyone insane? We would not allow a convicted murder to endure those conditions.