The SE tactic in practice: be friendly, don't disclose your agenda, and ask "how do you know that?" repeatedly

The operational tactic is: be very friendly, don't tell the person what you are doing (since Boghossian tells them to hide it), and just ask recursive "how do you know that?" questions until the person experiences psychological doubt about things they cannot answer on the spot. The goal is not truth-seeking but instilling doubt — once doubt is created, the SE practitioner considers their job done.