OK. For me, I can say that reading the above (yes, all 5 pages of it), and putting a bit of redneck in it, I have absolutely no doubt at all, simply basing it on the level of the cerebration involved (like that word, eh? Cerebration, that's right y'all, a couple of advanced degrees over here and stuff), that I have no doubt that, John, Katherine and Mary can put a serious... the technical term is "Whomp" on someone, should they have a "need" to do so.
But, let's define "need," to define that. Or not, as I'm certain everyone knows the difference between want and need.
That being said, it takes a very, very skilled uke to not taken any remedial action in preparation for a technique they know is coming, e.g. the regular class situation. We've got a saying, "Anyone can defeat a technique they know is coming."
So, we also have another saying, "Nothing ever works. You just keep going until both of you are surprised."
So, on John's quote, which I absolutely loved, "Sometimes, the proper response is to drop your partner on her butt, then explain that while her obstinate attitude is not a problem in application, it is making the current exercise more difficult."
See, John's really nice, and he's all cerebral and stuff. I'm more down home, and would say, "You can do that again if you want, but you aren't learning what you're supposed to be learning while you're down there. If you want, after class, I'll show you how you ended up down there."
I've posted before about the best athelete in my school, a tang soo do black belt, I think she's a 2nd degree in TSD, she was in it 12 years of steady training, so that'd be about right I think, or maybe a bit behind. Anyway, she's the one who "challenges" the "what" we are doing on an almost dily basis, wanting to know "if it works" etc. So, I just shrug and show her. She predictably attempts to block or defeat the technique "on the board" right then, which she does, and because she really doesn't know how what she's done ruined her posture, or gave up her balance, or put her in a vulnerable position, or sometimes all of the above, it devolves to me to show her or point it out to her, usually involving a grunt on her part as she's compressed into the mat, or stretched out in a lock, dumped on her butt, or whatever. It's just the nature of the thing. Beginner's question. They don't understand , and that's OK. Remember, "Question Everything." It's not a bad place to learn from and it's not to be feared.