Our brains exist in reality and the brain generates our thoughts, therefore can it not be said that thoughts exist in our reality, so to think of something that doesn’t exist, will bring it into existence. What do you think fiction is? It doesn’t exist, but when we write about it and think it up, it now exists. Imagine how many gods we forgot as time marches into the nonexistence we talk about. To bad they only existed when we need them.