In the frequently referenced FAQ question, Must All Answers Be Referenced there is an exemption:
There are some types of questions that we can safely answer without needing references, however, such as claims that blatantly violate some laws of nature or known scientific facts (around high school level). For example, debunking a claim about a perpetuum mobile, linking to Wikipedia's article about the laws of thermodynamics might be advisable, but only for the reader's convenience.
(I am looking to solve the generic issue, not the specific one related to that question.)
In short, the question challenged a fairly basic concept that is at the high-school level. The first draft of the answer addressed the question by using the same high-school level concepts, with no references. It was challenged (by me) for having inadequate references, and the author defended themselves by saying the concepts were basic ones taught in many high schools, and therefore needed no reference..
Do you think this defence is fair, and that it was inappropriately tagged for having no references?
Do you think the initial complaint about the lack of references is reasonable, because the answer is just a repeat of the claim?
If you think the complaint is fair, do you think we should edit the FAQ to explicitly state that (for example) if the question itself challenges a concept taught in high school, it is necessary to provide references to support the high school level "facts", or is this rare enough to not need explicit calling out?
What is your view?