Would it be on-topic to ask here:
Did Einstein actually say:
"Make everything as simple as possible, but no simpler?"
By my reading of the FAQ, I would think not. Skeptiks is about:
Skeptics Stack Exchange is for challenging unreferenced notable claims, pseudoscience and biased results.
But this question is not about challenging the claim that it is best to make everything as simple as possible -- only that Einstein claimed that it was.
So, is this question on-topic here?
Note: I'm aware that there are some questions on Skeptics which ask very similar questions about the attribution of a particular quote, and many of those were well-upvoted and not closed. However, since StackExchange is not a perfect model of it's own policies (as commonly seen on StackOverflow), that does not mean those questions are on-topic.