Would different people understand 'rigorous' in different ways? Would be my main question - for one person, this could be a solid mathematical proof, for the next, a long detailed argument containing no numbers, so is there an easy way to reconcile this, or would that matter if we had it clearly written what is/isn't required? (I'm going by the issues on WB where it took quite a lot of effort on your (mods) part to get people to use the tag properly)

I do see the issues about 'researched' though... Depending on what we set the requirements to be, I could see 'referenced' quite easily (but I'm biased on that one)

It's been a few days and "rigorous science" seems to have the most support. I think it's an improvement on what we've got now. Shall we change it? Also, please consider adding a help topic about what's expected for that category, and we can link to it from the category description.