0k, if an entity starts grading the claims of others for truth or falsehood, would it be held responsible for those claims it does not grade or for incorrect grades? Or is the grading “caveat emptor” and the recipient of information has no guarantee of truth or falsehood anyway?

Is a lack of a label on the below an endorsement of Theranos’ technology?

https://twitter.com/SenJohnMcCain/status/654714209360437249