Searched for "noble lie" and found...nothing? > Information hazard: A risk that arises from the dissemination or the potential dissemination of (true) information that may cause harm or enable some agent to cause harm. I'm getting the sense there is an underlying loop in the reasoning to support this concept of hazard, where the direction of truth and information seems confused. There's also the question of the durab…
I think you need to read more carefully. For example, he explicitly anticipates and puts aside some questions you ask:
"In this paper, we will not be concerned with postmodernist critiques of the idea of objective truth nor with skeptical doubts about the possibility of knowledge. I shall assume some broad commonsensical understanding according to which there are truths and we humans sometimes manage to know some of these truths."