We all know that Jorah is a liar but he literally lies to Dany in his first interaction. He says, "I served your father for many years."
True, but this Jorah is much more of a polished lord than the other Northerners. Half the time I find it hard to believe that he's the same character as the big burly hairy man of the book, but at the same time, it works to make his lying more believable.
