In dialogue processing applications where words like I'' and me'' are used, it can be important to know the identity of the speaker; for example, in the Calendar application, one could say When is my next meeting?'' or Am I attending a meeting on Friday?'' When doing regression testing, it is then useful to be able to set a notional speaker, so that responses to time-dependent utterances stay stable.

The {\tt SET\_\-NOTIONAL\_\-SPEAKER} command makes it possible to set the identity of the notional speaker from the command-line. The argument should be an atom, e.g. \begin{verbatim} SET_NOTIONAL_SPEAKER manny \end{verbatim} The notional speaker can be retrieved using the predicate {\tt get\_\-notional\_\-time/1} in {\tt PrologLib/utilities.pl}.