Open AccessNouwen's Puzzle and a Scalar Semantics for Obligations, Needs, and Desires
Author(s) -
Daniel Lassiter
Publication year - 2015
Publication title -
proceedings from semantics and linguistic theory
Language(s) - English
Resource type - Journals
eISSN - 2163-5951
pISSN - 2163-5943
DOI - 10.3765/salt.v0i0.2608
Subject(s) - scalar (mathematics) , obligation , modal verb , monotonic function , semantics (computer science) , possible world , modulo , class (philosophy) , mathematics , epistemology , computer science , linguistics , mathematical economics , discrete mathematics , artificial intelligence , philosophy , programming language , law , verb , mathematical analysis , geometry , political science
Nouwen (2010a,b) presents a puzzle involving the interaction of degree expressions and modals: a class of apparently unremarkable sentences expressing minimum and maximum requirements, obligations, desires, etc. are predicted to be trivially false or undefined, or receive otherwise incorrect truth-conditions. I suggest that the puzzle can be resolved if we treat the affected modals not as universal quantifiers over possible worlds but instead as scalar expressions which map propositions to points on a scale of expected utility. Independent arguments indicate that these modals are scalar, non-monotonic, and information-sensitive -- facts which are highly problematic for quantificational theories, but predicted immediately by the proposed scalar semantics. With no extra modification, this semantics also predicts the correct truth-conditions for Nouwen's examples, modulo some subtleties involving epistemic interpretations of minimum and maximum operators. These conclusions provide additional evidence in support of previous work arguing that the semantics of obligation and desire should be built around a non-monotonic scalar semantics rather than quantification over possible worlds.