Kevin,
“How are you cutting off the attack? Is your punch acting as a natural defense? If so, is this not still ‘trapping’ in a sense?”
Yes the punch is acting as a defense. If I hit him before he can do anything, then I cut off his attack. If I punch and it controls the line by deflecting his punch, then I cut off his attack. If I just step into the punch before it is fully extend and send him flying, that is also cutting off the attack. One concept can have limitless applications.
What is your definition of ‘trapping’?: Is it bridge on bridge? Is it a collection of techniques? Is it immobilizing a limb?
“Change and adjust what? … But even if an opponent’s primary weapon is out of reach, is that still not in a sense, ‘trapping’ his weapon?”
Again, what is your definition of trap? I change and adjust based upon what he does. I can’t give you a specific answer without a specific situation. What is the primary weapon? Is it the limb that just tried to hit me, the force from his pressure that threatens to knock me over, or the body and mind that control the limbs?
“Again - change and adjust what? Have you ‘trapped’ your opponent’s weapon outside of your gates/perimeter?”
If in contact, I adjust to his force so I remain rooted and control his center of gravity. If not in contact, I step to find a good position. If I can hit him, I do. If I can’t, I establish a bridge and then destroy his end at the foundation.
Yip Man didn’t teach trapping. He taught Wing Chun. Everyone makes mistakes, which is what the tools of the system are for. The tools, however, are not limited to just ‘trapping’. You can translate the WC tools and concepts (pak sau, lop sau, tan sau, etc.) as ‘trapping’, but then you lose a lot of the depth behind their meanings.
Dzu