pain that
            may be felt by a perceptual agent. Although the agent is
            often a living entity, this is not required. The source of
            the pain could be either external or internal; in either
            case, the subjective feeling is generally `sharper' and
            hopefully shorter-lived than just `a feeling of discomfort'
            (see: #$LevelOfDiscomfort.)<br />
            <b>guid: </b>4579d7c8-74ae-11d6-8000-00a0c99cc5ae<br />
            <b>direct instance of: </b>