I read in this link http://writersrelief.com/blog/2013/11/what-is-considered-previously-published-writing/ that if you post your story on a social network it's considered as published. Now I have a question. If I'm going to get published in a magazine, do I have the right to show some of my sentences and not the whole original work to others in the social media before getting published? Also, if I'm unsure about the grammar of my sentences can I ask questions about it in a website and use people's suggestions in the version that's gonna get published in the magazine? I mean, the answers I've got from people may be noted in the story and therefore, the story that is published in the magazine, is not 100% my own work. Is it?