Evidence you can use
Evidence library
Short research briefs on the questions people actually ask, each one rated for how strong the evidence behind it is — and each one saying plainly what is still unsettled.
Four strength ratings · Uncertainty stated, not buried
Briefs
What is established, and what is not yet.
No briefs are published yet
A research brief makes a claim about what the evidence shows, which is exactly the kind of page that should not publish without review. The rating method is written up and ready.
How we rate evidenceClear answers, without pretending every answer is settled.
Read how the strength ratings work before you rely on one.