Ray doesn't know it all, of that I have no doubt. Looking at his Telemarking technique on the Real Heroes of Telemark was enough for me, later it was confirmed by my brother that Ray struggled with telemark skiing. His Troop Commander told him everything that happened on the RHoT, he was a Sergeant at the time of the filming and one of the Commandoes from the Mountain and Arctic Warfare Cadre that was on the programme, Jason Milnes I think he's called. Also, footage was shot that made it look like Ray did the massive journeys with the re-enactors which he didn't. He burnt himself on his billy can, a greenhorn error apparently, on the American episode of his Bushcraft (should be called Skill Sets!) series, and there have been times when he does things that I think he aqcuainted himself with the technique five minutes before the camera rolled!
Don't get me wrong, the guy is human and makes errors just like the rest of us, but there is no way he is perfect and doesn't know it all. There are things he needs to learn too, although i have no idea what they are! Every day is a learning day, when it isn't life becomes dull.