 One way of responding to the plurality of conceptual structures is to suppose that concepts have multiple types of structure. This is the central idea behind conceptual pluralism. According to one version of conceptual pluralism, suggested by Laurence &amp; Margolis (1999), a given concept will have a variety of different types of structure associated with it as components of the concept in question. For example, concepts may have atomic cores that are linked to prototypes, internalized theories, and so on. On this approach, the different types of structure that are components of a given concept play different explanatory roles. Reference determination and compositionality have more to do with the atomic cores themselves and how they are causally related to things outside of the mind, while rapid categorization and certain inferences depend on prototype structure, and more considered inferences and reasoning depend upon theory structure. Many variants on this general proposal are possible, but the basic idea is that, while concepts have a plurality of different types of structure with different explanatory roles, this differing structure remains unified through the links to an atomic representation that provides a concept’s reference. One challenge for this type of account is to delineate which of the cognitive resources that are associated with a concept should be counted as part of its structure and which should not. As a general framework, the account is neutral regarding this question, but as the framework is filled in, clarification will be needed regarding the status of potential types of structure. 