I'm happy to “reason together”, to quote The Godfather. Three is already fewer hearings than I wanted. I could live with two; I think one would be too few.
Maybe another way to do this is that instead of defining the number of meetings, we define the number of hours of hearings, because if we say the number of hours of hearings and a witness is available for one hour, we give the chair flexibility to have something else happen in the same meeting.
Another option would be that if a witness is able to get an extra hour, we could do three hours of hearings together, so maybe we could say as a compromise that the committee would hold five hours of hearings for the situation, which would add up to two-and-a-half normal meetings.