It Is believed that Ip Man (Yip Man) gave just two interviews. In this interview with "NEW MARTIAL HERO" magazine he talks of his meeting and subsequent training with Leung Bik the elder son of the famous Dr Leung Jan.
Some try to discredit Ip Man and his teachings, claiming that Leung Bik never existed. However it is said that there are Wing Chun/medical manuscripts that were written by Dr Leung Jan which passed to his son Leung Bik who passed them to Ip Man.
And one could wonder, why would Ip Man invent Leung Bik?
Who to believe? I have no reason to disbelieve Ip Man's account.
However whether the story is fact or fiction there is no disputing the effectiveness of Ip Man's Wing Chun.