Dook Goo Kau Bai is certainly one of the most mysterious characters in all of wuxia fiction. He was undoubtedly one of the most powerful warriors ever to have lived in the Jin Yong universe, but it is difficult to confirm beyond all doubt his rather outlandish claims of invincibility. All we know about Dook Goo Kau Bai's martial arts is what three of his "followers", Yeung Gor, Fung Ching Yeung, and Ling Wu Chung, were able to glean from the fragments of information and artifacts he left behind. The martial arts skills of these characters only gave us a glimpse of Dook Goo Kau Bai's martial arts. Based on what you know, do *you* believe Dook Goo Kau Bai's claims?