I don't think you understand what I mean. This page describes the difference between "normative" and "descriptive": https://www.miamioh.edu/hcwe/hwac/teaching-support/disciplin...

I'm not making the claim that the conclusion that WWII U.S. governments came to was right (in a moral sense), or correct (in that it was going to reduce the probability of sabotage given their knowledge at the time), I'm making the claim that knowing about Ni'ihau makes their actions make more sense. It is an important piece of context. It allows you to better-understand their state of mind and the state of the world while they were making these decisions.