Linguistic research and cognitive grammar frameworks support the view that nouns and verbs function as universal grammatical categories grounded in conceptual structure.
Paper [0] explicitly addresses and defends the claim that nouns and verbs are universal grammatical categories, satisfying the criteria for support. The remaining papers discuss word classes, parts of speech, or grammatical features in specific languages (e.g., Shiwiar, Spanish, Pahari, Chinese) without directly challenging or evaluating the broader linguistic consensus on the universality of nouns and verbs as categories. Thus, the available evidence supports the claim.