It turns out Betts ran into Lewandowsky, physically, at a conference. Why a psychologist and a climate scientist would go to the same gathering is a different matter but the two scientists had a little chat over coffee (about one being called a conspiracist by the other), and lo and behold they “cleared the air’.
The comment that qualified Betts as ‘conspiracist’ in the paper is unequivocal: it meets criteria set out by the authors. I cannot see how the air can be cleared. As far as one can tell, Betts did not stand up for the principle but like the rich and powerful who bought papal indulgences or skip the waiting line at bank counters, he went backstage.
This brings up another point: you can be a conspiracist and still get out of Lewandowsky’s list. Possible if you are well-connected. That or you have coffee with Lewandowsky. I wonder if the people attending his Bristol conference have a little chat and coffee and get their names off his list.