Phrasal constituency(as what humans unconsciously track)
The way words group together into meaningful chunks or phrases (like 'the red car' or 'ran quickly') rather than being processed as individual, isolated words.
semantic content(Cappelen and Lepore's literalist/minimalist framework)
Propositions determined solely by conventions of meaning, precisification, disambiguation, and reference fixing — not by pragmatic inference.
syntax(Morris/Peirce semiotic framework)
The form of expressions in general, encompassing phonology, morphology, and sentence structure