A medical association is a particular kind of room. Everyone in it has spent years learning to distrust a claim that arrives without evidence, and they have all sat through a great many presentations.

This is a longer look at Gentry working that room at the Society for Vascular Medicine: no volunteers made to look foolish, no hype, and nothing that asks a group of physicians to switch their judgment off for an hour.

Useful viewing if you plan meetings for associations, medical societies, law firms, or any audience that is paid to be skeptical.