Does not the Catholic Church permit the use of lies in the defence of her worn-out dogmas?

Her dogmas are anything but worn-out. However to your main point I must reply by giving you the moral teaching of the Church concerning lies. The Church absolutely prohibits the use of any dishonest means, and declares that a deliberate lie is a sin under all circumstances. No good end in view can justify a lie.

Radio Replies Volume 1 by Rev. Dr. Leslie Rumble MSC and Rev. Charles Mortimer Carty