When I say they are all surface-level, I mean there is no Tier-1 application, and within TKD there isn't a push for a Tier 2 or Tier 3 understanding. A lot of it sits at that Tier 1 movement, with no Tier 1 application. Maybe I need to re-work my model, add in Tier 0 as the movement in the form, with Tier 1 as the literal application. That makes more sense.
So applying that to the double-knife-hand, as it is trained in KKW TKD:
Now, we can do the analysis. It can be done as a self-study elective by a TKD student, or as a part of normal training by a Karate student. We can come up with:
- Tier 0: Double-knife hand block, chambered with both hands to one side, executed with the main hand in front and off-hand at your solar-plexus.
- Tier 1: ??
- Tier 2: ??
- Tier 3: ??
*I put a ?? here, because we did discover in this thread, the Tier 1 application could simply be to teach the concepts in Tier 3, and there isn't actually a direct Tier 1 application. If so, it hasn't really been made clear. The specific details I had a problem with (the orientation of the off-hand, for example) seem to fit this purpose. There may be a better Tier 1 fit, but there isn't a practical one, not that you or I could find.
- Tier 0: See above
- Tier 1: ??*
- Tier 2: This motion is similar to a wrist lock or a choke escape. It can also be similar to a leg sweep this way or that way. It can also be similar to a block and strike to the ribs.
- Tier 3: This motion teaches the body mechanics of how to move both hands together. It shows putting your off shoulder into the block, which translates will into a strike-and-counter motion. It teaches how to move your shoulders with your hips during turning motions, which is useful for sweeps.
To be honest, a lot of the Tier 3 stuff wasn't apparent to me until today. The Tier 2 was, but I was still left with that burning ?? at Tier 1. And we can talk more and more about Tier 2, and fill it with paragraphs and paragraphs of information, but there's still that nagging ?? at Tier 1.
Now, maybe I missed it, but I don't think anyone actually took the time to say "there is no direct application for that movement." There wasn't anyone to say "you train that movement this way, because of X." @pdg is the first person to answer that question, in the many threads I've brought it up. As much as I've been arguing with him in this thread, I don't think he realizes just how grateful I am that he made this clear to me, because it's something I have been struggling with for years. There may not be a direct Tier 1 application, but at least there is a Tier 1 purpose of the form that translates to the Tier 3 analysis.
With that in mind, the Tier 2 analysis does not require a Tier 1 application in order to be performed. Your analysis pretty much proves this, because you could do that Tier 2 analysis without the Tier 1 application. All of that Tier 2 analysis serves a great purpose, a good mental exercise, good martial training, and all of that. But my quest is to get rid of that "??" in Tier 1. Pdg has come the closest to doing that of anyone I've asked.
Ok, so a possible tier 1 from that spec for the knife hand block in question...
The lead hand is blocking* a punch or knife hand strike with a knife hand.
The reaction (off) hand is adopting a guarding position of the mid section.
Now that's one reason 'we' call it a knife hand guarding block - close the hands and move the arms 4-6" and you've got a forearm guarding block.
*(I use the term blocking, but redirection is more accurate)