[Tsuwabuki]

I want numbers. I want studies. I want research literature. When dealing with policy changes what we "know" at our common epistemic level is no longer tolerable, as we have entered a higher epistemic level requiring much stricter standards of evidence for any of our "knowledge" to be epistemically justifiable, and therefore defendable.

In the lower epistemic context, I think we can all claim to know what you say above. However, for the purposes of policy, I do not think we can make that same claim at all.