Here the Wing Chun stance takes forward pressure.
Now look at this picture from Tom - same stance - similar test - different result ! The JKD stance is solid but the Wing Chun stance buckles under a palm. Mmmmmm.
This is Ted Wong here, too, involved. He was Bruce Lee's training partner. And he appears in Randy Williams' Wing Chun training videos so he no stranger to these issues.
So what's going on ? What sense are we to make of all this ?
The point is how when you crosscheck your information in martial art research you sometimes get 2 different answers. I have seen this Wing Chun stance pressed forward so I know it can withstand some pressure. Alan Orr - a MMA inclined Wing Chun player - has this useful drill that is worth checking out below. I adapted it from his www page just to examine a point :
http://www.alanorr.com/htdocs/articles/wcpowerarticle.html
I may invite all 3 authors - Gibson, Tom / Wong and Orr - to reply to what they see here and explain what the issues are involved here.
It would be interesting to get feedback from each of these experts: to explain how the same forces applied to the same structures yield different results ! What is it I am missing here ?
PS. ON reflection this should be telling us to pressure test the knowledge we are given and double-check it. Take nothing on trust alone. If the Wing Chun stance takes time to perfect and eek out its nuances then I can imagine the JKD comparison being 'accepted' by the student as 'true'. I am not in a position to judge properly what is 'true' here. I may have missed a point. But I suspect this example isn't isolated in martial art literature. (It isn't isolated in chess literature. You get the same positions on the board sometimes evaluated differently - it drives you nuts if you 'need' your answers given to you).