Honesty with oneself is the first step in the situation in order to eliminate the impossible. I believe Jana's breasts are real, but not because of the boob proof experiment. As for Rio, again, another example of comparing someone and saying there is a similarity they both display, but claiming one is undoutedly real making the other one real as well, when you can't really do that. That being said, the last picture of Hitomi is out of this world.