His explanation... demons, as fallen angels, are more crafty than us and can thus reliably avoid detection. I like that, it makes for a good story. It is also a

His explanation... demons, as fallen angels, are more crafty than us and can thus reliably avoid detection. I like that, it makes for a good story. It is also a falsifiable hypothesis. Does setting up hidden recording equipment in his office cause his patients to stop displaying evidence of demonic possession? If so, there are explanations more likely than demonic omniscience -- ideally this trial would be double-blind to prevent him from influencing the subject -- but it would be an interesting result nonetheless. Alternatively, he records a sophisticated conversation in Church Latin with a 20-year-old uneducated construction labourer, which would lend at least some credibility to his claims.