[Poohbah]

How do we get to the point where we can reliably produce only parts if this area of research is off-limits?

I was speaking of doing it with human beings. Animals are different.

[general_re]

Okay, gotcha - so we should push the research as far as we can with animal subjects, before trying techniques on human subjects. That seems reasonable enough, but the first time you try anything with human genes or human subjects, there's still going to be some risk, although hopefully a very small one.