Erhman has been refuted so many times it's a wonder anybody would run around claiming he's some great 'scholar'. Darrell Bock alone has shut him down literally every time Bock bothered to critique his books, as well as Elaine Pagels and the rest of the fake 'scholars' from the Gnostic revivalist scam. The Peanut Gallery can start with Bock's The Missing Gospels, a work explaining to lay people from a secular point of view why the various popular modern claims of the original orthodoxy being 'falsified' is rubbish and nonsense by merely using textual analysis and historical records. From there it gets very easy to prove the Erhman claims are total rubbish.