This chapter explores how generative AI can support students as they develop, test, and refine thesis statements. Acknowledging the challenges writers face in developing original arguments, the chapter introduces a step-by-step framework for evolving a vague idea into a unique, arguable, and specific thesis. It emphasizes the iterative nature of argumentation and shows how AI tools can help writers draft provisional claims without sacrificing agency. The chapter’s structured exercises are designed to test and strengthen their claims using inductive and deductive reasoning, classical rhetorical appeals (ethos, pathos, logos, kairos), and fallacy detection. Through these exercises, students can learn how to generate sound arguments tailored to their purpose and audience while also becoming more aware of their own assumptions and reasoning strategies.