The source is himself supposedly as one of those in that select group. Other people in the thread consider him an authority as well. He states that that contrar

The source is himself supposedly as one of those in that select group. Other people in the thread consider him an authority as well. He states that that contrary opinion is niche and has been at least partially refuted by new events. From my point of view it's a much better source than yours or mine reading of licenses.