I'm confused. So, say you're a devout Catholic. A demographic form asks you to select your religion from a list of 10 options, e.g. Islam, Atheism, Agnosticism, Judaism, etc. Do you refuse to answer the questionnaire because it would be admitting that people who follow those religions--and even atheists--exist? In your mind, of course, Catholicism is the only true religion and it's a sin to pray to or believe in other gods.