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If there is such an ambiguous request, the elevator should ask a clarification question and be reset to state 3.
The Saarbrücken Phonetics department is in the same building as the CL department. They use the same elevator, and because they are on floors 4 and 5, they probably use it quite often. Now someone might ask the elevator: ``Take me to the phonetics department!'' If there is such an ambiguous request, the elevator should ask a clarification question and be reset to state 3. For example, the elevator should ask ``Do you want the 4th or the 5th floor?''.
?- Question!
How would our automaton have to be extended to deal with this situation?
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