Characters
(over the intercom) Attention please, I need a volunteer for a thankless chore. Shall I assume the only hand in the air is Lisa Simpson? Thank you, Lisa.
— Principal Skinner
Behind the line May contain spoilers.
Our reading
An editorial interpretation.
The announcement asks for a volunteer but immediately assumes who will respond. Naming Lisa without waiting makes her willingness seem entirely predictable. Calling the chore thankless adds a dry contrast between the lack of reward and the expectation that this same person will still offer.
Context reviewed