 This language of collection and division invites medieval philosophers to call the divisible items wholes, and the products of these divisions parts, but most medieval philosophers are not tempted to think that universals are literally composed out of individuals or lesser species. There are noteworthy exceptions. For example, an anonymous twelfth-century philosopher carefully articulates and spiritedly defends a version of what is often called the collection (collectio) theory of universals (Pseudo-Joscelin De generibus et speciebus §§ 84–153 (2014, 158–85)). But, in general, universal wholes are clearly marked off from other kinds of whole, and their behavior is thought to be distinct from the behavior of potential and integral wholes.