Appeal to authority. Please try again, I'm curious.
Moreover, Dyson's points are based on good Science. He focuses on measurements and data, which are hard evidence. Dyson does not appeal to emotion or fear.
That is an explicit appeal to authority.
But then, only in a fantasy world do people not appeal to authority. Someone who has a track record is always more reliable than someone who lacks it. And, to be honest, this is a good thing.