I can't speak for everyone, but any time I think about a story and then act on the thoughts, no matter how few "new" words result, I count it as writing. It's all in service of making progress on a story; it all serves the narrative. (We all serve the narrative. It rather makes us sound like feudal vassals. There are...intriguing parallels. [It's also possible I've just watched too much The Witcher].)