Yeah, both of you make sense, and both of your ideas are probably better than what was in the movie. I personally think that his line about needing an objective way to measure was simply his rationalization for wanting to add science to the Force and a defense against those of us who didn't like it. I just like to argue that, if he really wanted them that badly, there was a better way to do it.

Then again, I guess you could say this whole thing started in ROTJ with all these references to the Force running in one's family. Of course, at the time, I always thought about it as more of a coincidence than any kind of serious genetic trait.