Descriptive Content and Orientational Structure in Predication: _Why Natural Language Requires Four Clause-Level Operators_

Declarative sentences perform two distinct kinds of work: they contribute descriptive content about states of affairs, and they fix how that content is to be evaluated. While most verbs contribute primarily to descriptive content, a small class contributes primarily to evaluation itself. This paper argues that English lexicalizes exactly four ultra-general orientational operators—be, have, mean, and cause—which exhaust a minimal grammatical space generated by two independent parameters: (1) whether evaluation targets world-structure or contrast-structure, and (2) whether predication is invariant or instance-selecting. This framework explains persistent philosophical puzzles about causation, meaning, and identity by showing how orientational structure has been systematically mistaken for ontological content.