Fries XOR a Salad
A programmer answers 'yes, both' to 'fries or salad?' (inclusive or) until the server rephrases it as XOR.
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/2022-01-01-fries-xor-a-salad/ (CC BY-NC 4.0)Transcript
Server: "Would you like fries or a salad?" Customer: "Yes, both." Server: "Sorry, fries XOR a salad?" Customer: "Oh. Fries."
[Caption] "It turns out the only person who can effectively wait on a computer programmer is another computer programmer."