You’re a science professor. A colleague asks you to arbitrate a dispute with a student over a question on a physics exam. Your colleague thinks the student deserves a zero, but the student demands full credit.
Here’s the question:
“Show how it is possible to determine the height of a tall building with the aid of a barometer.”
The traditional answer is clear: You take pressure measurements with the barometer at the top and at the bottom of the building, then use the difference to compute the height.