“We furthermore forbid any lay person to engage in dispute, either private or public, concerning the Catholic Faith. Whosoever shall act contrary to this decree, let him be bound in the fetters of excommunication. — Pope Alexander IV (1254-1261) in “Sextus Decretalium”, Yup. The RCC knows that if their parishioners debate with non-Catholics, they'll risk hearing the truth.
Can't have that happening. They'll end up leaving the church and cut into the financial base.
We furthermore forbid any lay person to engage in dispute, either private or public, concerning the Catholic Faith. Whosoever shall act contrary to this decree, let him be bound in the fetters of excommunication. — Pope Alexander IV (1254-1261) in “Sextus Decretalium you do realize, of course, that he was addressing only Catholics here....there weren't any other Christians.