4.1.2 Agent
Actor with concrete, physical manifestations, such as a human individual. We use the term agent instead of person for generality, so that it can be used to refer to human as well as artificial (hardware/software agents). An agent has dependencies that apply regardless of what roles he/she/it happens to be playing. These characteristics are typically not easily transferable to other individuals, e.g. its skills and experiences, and its physical limitations.
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