I missed that it gave the degree. Neat. I had presumed it was of some utility but also reinforcing that it can't be used as a single source of truth (just like Detect Evil is not a license to kill despite the parodies).
But it inspired a joke about the most zealous person using the least reliable spell I could think of for the least significant difference being mistaken as a valid difference.
Oh what about "Pose Trolley Dilemma"?
As you cast this spell speak aloud and concentrate on a trolley dilemma. Entities will glow green for option 1, orange for option 2.