Once in a while (and at least twice recently) someone asks questions about, say, “alternate” scientific claims (flat Earth and sight explained by rays from the eyes). This questions are generally closed as off-topic for this site, and I can see why. However, I believe they might be relevant to the spirit, if not to the letter, of this site: they tackle questions – and answers – through which (at least some thread of) the scientific thought has passed, and which can still be convincing, or puzzling, to young or non-well-educated people.
So, would it be even thinkable to modify the topic description for Skeptis.SE to allow such questions to be asked? Or, could we admit a strained, reversed interpretation of our “notable claim” charter? The challenged notable claim could be the one about, say, the roundness of Earth or the existence of photons (or whatever), and the answers could confirm the claim. After all, a claim challenged here could be true, a photo could be legit etc.