That was always the question, was he lying for the policy purposes of Bush and His Evil Minions™, or simply because he is a liar
It’s now confirmed that he lies because he has some problems. Seriously.
This time he is doing it about a myth that has been debunked on Snopes, specifically he claimed in a speech that he “heard the tape” of the exchange in which an officer on an aircraft carrier demanded that a lighthouse change course.
In truth the Navy debunked this a decade ago.