Nonsense.
1) He is capable of surviving without being physically attached to another human being at all times.
You're telling me your 72-year-old friend with Alzheimer's is attached to somebody else's body with an umbilical cord, which, if severed, would result in him being unable to continue to survive?
2) He has physically developed sufficiently to exhibit brain waves.
So you're telling me your 72-year-old friend has never exhibited brain waves?
3) He has developed sufficiently to be capable of acting at will.
Or acted at will?
4) He has an identity, even if it may have become distorted by disease.
Has no identity, no self-knowledge at all?
5) Ditto for a memory.
No ability to remember? More importantly, has never in his life had an ability to remember?
6) He is sufficiently mature to have developed the ability to breathe air.
Has never breathed air?
7) He is capable of feeling pain.
Is incapable of feeling pain? More importantly, has never been capable of feeling pain?
Nonsense.