The tutor is evaluating the student's written submission.
Session not yet started or fully torn down.
Microphone is open and the tutor is waiting for student speech.
The session is temporarily paused (e.g. break time).
The tutor is playing synthesised speech to the student.
The session has ended and no further transitions are allowed.
The tutor received input and is computing a response.
The tutor is waiting for the student to complete written work.
All named states the tutor brain can occupy.