Assertion: flatness | /r/HasProperty | callout
Facets:
value: regarding an /area/ of an object
type: OTHER
Source sentences:
text: I've always been of the mind that flatness is a callout regarding an /area/ of an object, therefore if you're going to callout a "flatness-per-unit" then the flatness should be a unit of area, which "inch" simply is not.