8. A method for conducting a dialog with a user of at least one computerized enterprise system, the method comprising: using at least one ontological entity to define user dialog topics including items; conducting a dialog with a user of at least one computerized enterprise system about an individual topic from among said user dialog topics, including generating a directed graph based on item references, from links between said items, by applying closure-based variable scoping in conjunction with backward-chaining-based logic to said directed graph; and identifying and scoring potential discussion forks based on said directed graph.
8. A method for conducting a dialog with a user of at least one computerized enterprise system, the method comprising: using at least one ontological entity to define user dialog topics including items; conducting a dialog with a user of at least one computerized enterprise system about an individual topic from among said user dialog topics, including generating a directed graph based on item references, from links between said items, by applying closure-based variable scoping in conjunction with backward-chaining-based logic to said directed graph; and identifying and scoring potential discussion forks based on said directed graph. 17. A method according to claim 8 wherein at least one item includes a query to be presented to an external computerized system.