For languages which have agreement both within clauses and within NPs, if NP-constituents agree in Number, clause constituents will almost certainly also agree in Number.
Standardized
Whenever there is agreement both within clauses and within NPs, IF NP-constituents agree in Number, THEN clause constituents will almost certainly also agree in Number.
1. 82.5% of languages in Plank’s sample have agreement both within clauses and within NPs.2. Cf. #1065.