Yeah, what Zuti said! ;-) Sure, folks will think in various ways...and Joy's post is a perfect example of that! But one has to examine the evidence and "most likely" and go beyond "sifu sez." As Zuti pointed out, in a culture where "saving face" is very important (and even more so in martial arts circles!), sure someone's followers are always going to tell the stories that make them and their teacher look good! Ip Man, Yuen Kay Shan, and Ng Chun So were known as the "three heroes of Foshan." They were known to be friends and to train together. Who here really thinks that Ip Man would not have learned from and exchanged with someone that was his senior and that he associated with on a regular basis? Rene started referring to the style as "Sum Nun Wing Chun" after visiting Sum Nun because Sum Nun's senior students demanded it! By all accounts Sum Nun did not significantly change Yuen Kay Shan's methods, he only added the 12 initial short sets that he had learned from Cheung Bo. You have to be careful with revisionist historical retelling that frames things in someone's favor. ;-)