Relax, I'm on your (and Terri's) side.
Feeble-minded was a word in common usage in 1930 when the book was written. People who lived in institutions were often there because they were too severely mentally challenged, ie feeble-minded, to be cared for at home.
Many people used the reason that Terri would never improve, (similar in a way to 'incurable') to justify stopping her nourishment.
I agree totally with you that therapy that may have helped her was withheld from her in the most cruel way. I was just quoting from an old textbook.
Terri was alive and well enough for her parents to take her home, even if she could not recover, who cares? The pro-euthanists go on and on about how one's life must be "productive". It does not matter to me wether a person ever even regains consciousness, we are not to be killing for the sake of another's ease. We all will eventually die - why hasten if?