Empty Set Claims Court
A plaintiff complains about a function from the empty set to itself; with nothing in the domain, the judge has nothing in her jurisdiction.
Use this cartoon
Free for classrooms, worksheets, slides and other non-commercial use under CC BY-NC 4.0, with credit to Ben Orlin.
Cartoon by Ben Orlin, Math with Bad Drawings. https://cartoons.mathwithbaddrawings.com/2024-01-01-empty-set-claims-court/ (CC BY-NC 4.0)Transcript
Judge (at the "∅ Claims Court"): "So this 'defective' function from the null set to the null set… what input did you try?" Plaintiff: "Um, there's nothing in the domain, so…" Judge: "Then there's nothing in my jurisdiction, either. Case dismissed."