Batshit insane person: “No Christian would do/believe X” Rational person (usually Paul or one of the peasants): “I know Christians who do/believe X.” Batshit insane person: “But they’re not real Christians!” After this exchange the batshit insane person typically begins to explain how their personal interpretation or made up definition is the ultimate truth and nobody can challenge it. Or, they switch to Ad Hominems.