One thing to be taken into account: the responses to attacks on different planes is based on the idea of not meeting force on force. The basic idea you are presenting is to beat force laterally. You could further generalize you theory to say that. It's not just: it's If Attacked with Z-Axis, foil with X/Y-Axis If attacked with X-Axis foil with Z/Y-Axis If Attacked with Y-Axis, foil with X/Z-Axis This idea conforms with a certain mode of thinking that is common among soft internal styles (such as TJQ or WC). Most of the defenses Sliver is advocating are force-on-force. Blocking a hammer fist with an upwards block is (essentially) a force-on-force approach. Blocking a hook by bringing the elbow up is essentially a force on force approach. Once the basic idea of "pure" axis attacks is understood by a student (straight jab, anvil-drop type hammer fist, purely horizontal roundhouse), you can easily extend this idea to encompass attacks that come in at an angle. For example, take an uppercut that comes up and in at a 45 degree angle. Instead of pulling out some complicated analysis, just change your frame of reference. Rotate your Y axis 45 degrees toward your opponent and think of it that way - now you deal with the force. Use the right hand rule. I learned this in physics. Point your thumb in the direction that the force is coming in to you, now wrap your fingers into a fist. Whatever directions that your fingers point in are viable directions for dealing with the blow. I would also like to mention that I have had some amount of success with WD's method of dealing with hooks. Instead of using a palm, I usually use the back or front of my forearm with my hand bent over the bicep. This keeps your wrist from getting hurt when you block an over-zealous hook with your palm, and gives it a better surface area so that it won't slip away.