Of COURSE "nihil obstat" and "imprimatur" refer to censorship! Have you never heard of Galileo?? Better yet, have you never heard of The Enlightenment? The essence of Catholism is the denial of opposing thought! DO recall the old joke about St Peter tiptoeing by the room filled with Catholics, explaining that "They think they're the only ones here!" As soon as I saw that the topic was censorship, I expected "nihil obstat" and "imprimatur"!