Real chat utterances are concerned with associative exchange of mental images. They are constrained by contextual relevance rather than by logical or linguistic laws. Time-bounds do not allow real-time construction of reasoned arguments, but only the retrieval of stock lines and rebuttals, assembled Lego-like on the fly.

A human agent has a place of birth, age, sex, nationality, job, family, friends, partners, hobbies etc., in short a “profile”. Included in the profile is a consistent personality, which emerges from expression of likes, dislikes, pet theories, humour, stock arguments, superstions, hopes, fears, aspirations etc. On meeting again with the same conversational partner, a human agent is expected to recall not only the profile, but also the gist of previous chats, as well as what has passed in the present conversation so far.

A human agent typically has at each stage a main goal, of fact-provision, fact elicitation, wooing, selling, "conning" etc. A human agent also remains ever-ready to maintain or re-establish rapport by switching from goal mode to chat mode. Implementation of this last feature in a scriptable conversational agent will be illustrated.