The thing is i dont know what X and Y are really since i dont do JKD, however i'll relate back to aikido again: aikido is very X-Y dependent, if you dont do X attack in basically exactly the right way, doing Y technique becomes almost impossible and really impractical. However within this "agreement" the whole thing works quite nicely.
Now i wonder if JKD works in a similar way. Are you taught to throw punches at your partner a specific way like in aikido?
I'll try and answer these questions for you, because i think that this is the perception of most people. And it's a legit assumption. But it's not correct. The "tic" for "tac" method that you refer to is not how trapping works or should be taught.
The focus of Wing Chun/JKD trapping is the development of high level "sensitivity". I always refer to "trapping" as stand up BJJ, because the same concepts and principles should apply to both.
if you grapple, you'll understand what i mean, and i'm not talking about under/over hooks, that isn't Wing Chun/JKD trapping. For instance, does a grappler do "tic" for "tac"? sure they do but not at higher levels, why? because at that level they are constantly changing and adapting. In other words, over the years and years of rolling, they develop high level "sensitivity".
Now Wing Chun/JKD trapping develops the SAME type of high level "sensitivity" but its applied to primarily the stand up striking game. Again, i am not talking about the "clinch" or "underhoooks" or "overhooks". This is not Wing Chun/JKD trapping.
Okay..let me catch my breath...whew...now with all that said, HERE IS THE MAJOR PROBLEM with Wing Chun and JKD methods...
Wing Chun'ers are hard headed individuals who cling to tradition and don't like to go beyond their own methods. This makes them very narrow minded. "Their way or the highway" mentality. On the flip side, at the higher levels, these guys are very very scary when it come to "sensitivity" and trapping skills. Because, it's ALL they do...and that's the rub. They don't learn any other aspect of "combat" to the same extent; such as the kicking, boxing, grappling ranges.
JKD practitioners are complete opposite side of the spectrum. They are taught to do "whatever" works mentality by mixing one style with another and another; eventually mixing in some Wing Chun trapping skills with everything else. But the problem is that since their knowledge is so "wide", they are not taught the very important "structure" and details of Wing Chun trapping. They learn just enough to "get them in trouble" sort of speak. In other words, they learn the "technique" but not how to develop the principles and concepts along with developing high level "sensitivity".
Pretend that the only thing you know about grappling is how to do a handful of "techniques" like the armbar and triangle for example. Knowing how to do them, does that make you a high level grappler? Hell...no. But that's what it's like when it comes to trapping in JKD. They only know basic techniques and a few drills. Does that make them high level Wing Chun trappers? Hell....no. But MANY pawn themselves of as such. This is why JKD trapping is a JOKE. less than 1% can actually do it on live opponents!
You also have to understand that the Wing Chun community and the JKD community are like two brothers that don't get along. They RARELY ever work together and almost ALWAYS bad mouth each other. This is why the "trapping" game hasn't evolved. Look at the BJJ guys in the early UFC. At first BJJ guys were owning using pure tournament BJJ. But eventually, strikers began to catch on and the MMA game changed. But the nice thing about BJJ is that it too has evolved when it comes to MMA, in other words, it's progressing along with the sport. This just isn't so with "trapping".
I'm working hard to change that. But i swear to all you guys out there...it works. I'm living proof it works in the MMA ring. I'm doing everything i can to progressing the trapping game so much, that i've dedicated my life to it.