As the author, Stuart, points out, he strongly disagrees with the sadistic conclusion as Rob is describing it:
If a theory implies that merely adding a life not worth living (with no other effects) is an overall improvement, that is a reductio that disproves the theory.
Indeed. But no serious theory of population ethics has that property,
As the author, Stuart, points out, he strongly disagrees with the sadistic conclusion as Rob is describing it: