In the fourth episode of this multi-part series, I provide a classroom exercise I recently used to demonstrate how additional knowledge about writing can support students' use of ROCSS. In particular, I introduced students to causal arguments (from stasis theory) as a way to generate content for their current projects. Stasis theory can be particularly helpful for students because it is, to my mind, first and foremost a tool for invention. Elements of stasis theory can be found across a wide range of genres--everyday conversations with friends, movie reviews, presidential debates, academic writing, and more. In the podcast, I discuss how I helped students see causal arguments at work in a grant proposal and a press release before offering them an opportunity to use it for invention in their own upcoming projects.