A guide to IL and SL in Spanish: Properties, problems and proposals

. This article provides with a state of the art of how the Individual Level / Stage Level distinction –and the related but distinct issue of the distribution of ser / estar– is instantiated in Spanish. We argue that the IL / SL distinction can be understood in two different ways: as a contrast between properties predicated of an individual or of a stage of that individual, and as a contrast between temporally persistent properties and temporary ones. The paper ends with a specific proposal about how to capture the distinction inside a structural system.