@mattblaze I posted before I saw your followup (that affidavits usually say "Based on my experience, <something> is indicative of <conduct>"). That aligns with the few affidavits I've read -- and this is not my area of expertise.
Still, I've believed citing an agent's training and expertise, alone, is not sufficient for PC.
Doctors still have to cite papers, even if they're experts. It seem reasonable for agents to cite specific courses and research that forms the basis of their training