Bernard Bard and Joseph Fletcher in The Right to Die originally published in The Atlantic Monthly, 221 (1968 Apr), p. 59-64. . [Source]
[People] have no reason to feel guilty about putting a Down’s syndrome baby away, whether it’s “put away” in the sense of hidden in a sanitarium or in a more responsible lethal sense. It is sad; yes. Dreadful. But it carries no guilt. True guilt arises only from an offense against a person, and a Down’s is not a person. There is no cause for remorse, even though, certainly, there is for regret. Guilt over a decision to end an idiocy would be a false guilt, and probably unconsciously a form of psychic masochism.
There is far more reason for real guilt in keeping alive a Down’s or other kind of idiot, out of a false idea of obligation or duty, while at the same time feeling no obligation at all to save that money and emotion for a living, learning child. The learning child might be a retarded one with a viable potential, or just an orphan in need of adoption.