Has Lauda lost it?

We got a rush of strange accusations about Lewis Hamilton, and Nikki Lauda telling us the shunt at the end of the Austrian GP wasn’t Rosberg's fault, even though the commentators and, more importantly, the stewards blamed Rosberg. Then, a day later, Lauda did a U-turn and denied everything. Spit the bones out of that! Or do we just assume that Lauda had a big  bet on Rosberg to win the race and it’s sour grapes because Lauda lost his deposit?