Universal 236: inflectional expansion: cases marking SUBJ, OBJ, ATTR ⇒ local cases;inflectional reduction: local cases ⇒ cases marking SUBJ, OBJ, ATTR

Original: During inflectional expansion, if there are cases marking subject, object, and attribute, there are also local and other adverbial cases. During inflectional reduction, if there are local and other adverbial cases, there are also subject, object, and attributive cases.
Standardized: During inflectional expansion, IF there are cases marking subject, object, and attribute, THEN there are also local and other adverbial cases.
During inflectional reduction, IF there are local and other adverbial cases, THEN there are also subject, object, and attributive cases.
Keywords: case, subject, object, attributive, local, adverbial
Domain: inflection
Type: implication
Status: diachronic (see Comments)
Quality: absolute
Basis: Ancient and Modern Greek (both Greek), French, Italian, Latin (all Italic), English, “Gothic” (both Germanic), Classical Armenian (Armenian), Hebrew (Semitic, Afro-Asiatic)
Source: Smith 1761 [1983], as interpreted in Plank 1992: 43

Universal 236: inflectional expansion: cases marking SUBJ, OBJ, ATTR ⇒ local cases;
inflectional reduction: local cases ⇒ cases marking SUBJ, OBJ, ATTR