I think he was still hiding the truth abouth Luke's father kinda the same way he says:Originally Posted by Reds/Flyers Fan
"A young Jedi named Darth Vader, who was a pupil of mine until he turned to evil, helped the Empire hunt down and destroy the Jedi Knights. He betrayed and murdered your father."
Both are sorta true but doesn't reveal the truth to Luke..... or its just a plot hole.