Obi-Wan by episode VI, according to episode III is a compulsive liar. 1.) He informs Luke that Anakin Skywalker never knew of Padme's pregnancy. - Anakin was very much aware of his ill-fated wife's pregnancy, although he did not know that she was carrying twins 2.) He tells Luke that Owen and Beru are related to him (I think he said that they were brothers in one of the episodes of Star Wars) - Episode II makes it clear that Anakin is the relation to the Lars family and not Obi-Wan Kenobi. Owen Lars is Anakin's stepbrother through Shmi Skywalker. 3.) Obi-Wan tells Luke that his mother took Leia to Alderaan to be raised by Senator/Viceroy/Prince Consort Bail Organa and his wife. - Padme dies of a broken heart after giving birth to the Skywalker twins. There is no way that she could have delivered Leia to Alderaan. Those are the main ones that I can remember at the time being. I just found it odd that the "good" guy lied all the way through the original trilogy and the villians (i.e. Darth Vader, Emperor Sidious) were truthful. The only lie that Obi-Wan told that can be redeemed was that Anakin had died at the hand of Darth Vader because hypothetically it was true.