What it requires. One value dominates a grounded field so heavily that the field distinguishes nothing.
Why it matters. A field where 98% of records share a value carries almost no information, but it looks like a populated field to anyone reviewing the configuration. The agent uses it and the answers do not vary with it.
How to fix it. Ground on the field that actually varies, or accept that answers cannot be differentiated on this dimension and say so in the scope.
Source. Our grounding quality specification v1, section 3
Is this rule worth checking?
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