I'm not sure I understand your first sentence. Who is screwed? Are you replying to the examples of wrist defense I asked about? Or have you not learned them? BTW, I keep mentioning wrist grab defense since that is usually the first techniques learned. They are very basic but get the student started on watching exactly what he is being taught, hand placement, opening the hand, foot movement, and other things. One must start learning these things correctly, early on. But I am hopefully preaching to the choir. I'm not sure I can agree totally. If I do some techniques wrong I agree that they may not work. Others may. If in the example I gave on wrist defenses, you fail to open your hand, you still may be able to grab the opponents hand and pull it up to where you can apply a painful grapple; but it will require more strength. If you fail to pull his hand into your chest you are very likely not to apply much pain compliance, but you should have some; but you will likely not be successful in completing the defense.