A thing of the sort “which might have a phone number”.

This class is intended as a broad category for people, organizations, and other entities which might be addressed in a social context, for example over the phone or via post. The emphasis on sociality distinguishes this class from that of Agents, which are defined based on their ability to perform actions. (Many Social Entities are also Agents, but many may not be—for example, Online Accounts are used by Agents rather than being Agents themselves. Nevertheless, Online Accounts may be addressed and sent messages.)

Despite the above definitions, phone numbers in are actually generally conceived as properties of Contact Points rather than Social Entities proper.