The Interpretation of Relative and Absolute Adjectives Under Negation

Negation typically has a contradictory effect on interpretation. At the same time, negated statements are often underinformative, which leaves room for pragmatic effects such as negative strengthening, where negated adjectives are pragmatically strengthened to convey their antonym (e.g., not large $\leadsto $ ‘small’). Here, we investigate a theoretical controversy relating to the mechanism deriving negative strengthening effects. According to Horn's (1989) account negative strengthening arises on the basis of social considerations, whereas on Krifka's (2007) account it arises via complexity-based considerations, yielding distinct interpretation patterns. We applied Horn's (1989) and Krifka's (2007) accounts to three distinct cases of negated antonymic adjectives: informationally weak relative adjectives, informationally weak absolute adjectives, and informationally strong gradable adjectives. Our experimental results demonstrate different interpretation patterns for weak relative (large/small) and weak absolute gradable adjectives (clean/dirty) under negation. These results confirm the predictions stemming from Horn's (1989) account of negative strengthening effects and highlight the importance of a semantic extension gap between antonymic predicates for the occurrence of negative strengthening. In contrast, our experimental findings concerning strong antonymic adjectives (e.g., not gigantic/not tiny) prima facie present challenges for Horn's (1989) analysis, while they do not endorse any alternative account.