3. The method of claim 2 , wherein accumulating the short-term shared knowledge about the current conversation further includes expiring the information about the utterance from the short-term context stack after a psychologically appropriate amount of time.
3. The method of claim 2 , wherein accumulating the short-term shared knowledge about the current conversation further includes expiring the information about the utterance from the short-term context stack after a psychologically appropriate amount of time. 4. The method of claim 3 wherein accumulating the long-term shared knowledge about the user includes updating one or more long-term profiles associated with the user to include information about the utterance received during the current conversation and relevant data associated with the information expired from the short, term context stack.