If a noun phrase constituent carries case and number inflection when co-occurring with a noun, it can also fill a nominal slot by itself and carry the same inflection.
Standardized
IF a noun phrase constituent carries case and number inflection when co-occurring with a noun, THEN it can also fill a nominal slot by itself and carry the same inflection.
1. Adjectives, Numerals and Pronouns in Hungarian (Ugric, Uralic) can step into a nominal slot and then take on nominal inflection but only demonstratives are inflected when co-occurring with nouns.2. The reverse is not so: if a constituent may function as a noun and be inflected accordingly, it does not necessarily carry the same inflection when in construction with a noun. This universal would correctly predict that the Hungarian demonstrative should be able to fill a nominal slot.
1. Adjectives, Numerals and Pronouns in Hungarian (Ugric, Uralic) can step into a nominal slot and then take on nominal inflection but only demonstratives are inflected when co-occurring with nouns.2. The reverse is not so: if a constituent may function as a noun and be inflected accordingly, it does not necessarily carry the same inflection when in construction with a noun. This universal would correctly predict that the Hungarian demonstrative should be able to fill a nominal slot.