Kant distinguishes cognition and thought. Mere thoughts do not conform to the conditions that Kant places on cognition and hence do not represent objects of experience. They are, nevertheless, intelligible, and play a vital role in our mental and moral lives. I offer the beginnings of an account of mere thought using Kant's resources. I consider four key cases of intelligible representations that lack objective validity: unschematized categories; transcendental ideas; philosophical concepts; thoughts that violate principles of the understanding.