The r/writing subreddit Principle states that if your question starts with the words "Is it ok" or something similar to that then the answer is invariably yes.
"Hello, r/writing. Can I use a particular gimmick or a plot device that has been used before but because I don't actually read books or do any research I just assume it to be a highly original idea?"
A place where a group of people can gather if they have been subjected to ideas that differ from their ideologies. These safe spaces have circle jerks, pointless discussion and a delusional moderator team. Presumably, this allows them to recover from the trauma; free from any lasting damage resulting from exposure to ideas that conflict with their beliefs.
Literary just a term created by the users on reddit that just means a subreddit that is similar to another subreddit that they created. It is also shortened to "Sister sub".