When you create a group, you can choose 3 privacy settings: Public, Closed and Secret. The table below shows who can join these groups and what people can see about them. If you're an admin of a group, learn how to change the privacy settings of your group.
For the album by Pestilence, see Doctrine (album). Doctrine (from Latin: doctrina) is a codification of beliefs or a body of teachings or instructions, taught principles or positions, as the essence of teachings in a given branch of knowledge or belief system. The Greek analogue is the etymology of catechism.
Doctrine is a set of accepted beliefs held by a group. In religion, it is the set of true beliefs that define the parameters of that belief system. Hence, there is true doctrine and false doctrine relative to each belief set. In Christianity, for example, a true Biblical doctrine is that there is only one God in all existence (Isaiah 43:10; 44:6, 8). A false doctrine is that there is more than one God in all existence.