The text you provided appears to be a thoughtful summary and interpretation of Stephen King's concepts regarding the writing process, specifically the ideas presented in his book "On Writing: A Memoir of the Craft." It discusses the distinction between the initial writing stage, where a writer works privately ("with the door closed"), and the revision stage, where collaboration and external feedback are encouraged ("with the door open").
Determining if this text is 100% AI-written can be challenging without additional context. However, it contains coherent ideas, structured reasoning, and specific references to King's work, which are characteristics that could be found in both human writing and AI-generated content. While AI can generate similar passages, a human might create them with personal insights or unique phrasing that reflects their individual style.
Ultimately, without knowing the specific source or context of the text, it's impossible to definitively say whether it is AI-generated or human-written. If you're concerned about this being AI-generated, consider the nuances in writing style, personal insights, and depth of understanding that may indicate a human author's touch.