Submission 147
Not so Fast: Cognitive and Pragmatic Demands of Negation
SymposiumTalk-03
Presented by: Francesca Capuano
Negation is a central yet cognitively demanding feature of language that highlights the need for effortful slowing and reanalysis in comprehension. Understanding a sentence like “The door is not open” involves suspending a default affirmative interpretation and re-evaluating the state of affairs. According to the two-step model of negation processing, the initial stage involves activation of the affirmative meaning, followed by inhibitory control and reinterpretation. These inhibitory mechanisms appear to overlap with general cognitive control systems. The reinterpretation and selection of an appropriate alternative depend on pragmatic reasoning processes, which form the focus of the present work. Listeners infer why a speaker chose to use negation, considering communicative intent and discourse relevance. According to pragmatic principles, negation is most felicitous when it corrects a false presupposition or contrasts with an expected state of affairs, contexts in which comprehension has been shown to proceed more smoothly. Even without explicit context, listeners infer plausible alternatives rather than strict logical opposites, highlighting the pragmatic nature of negation. This study extends these pragmatic insights to large language models (LLMs). Like humans, LLMs often struggle with negated statements, appearing anchored to affirmative meanings, particularly when no salient pragmatic alternative is available. However, in offline cloze tasks, humans tend to complete negated sentences with particularly similar alternatives, reasoning pragmatically about what alternative state would make the negated statement relevant. Only conversationally trained chat models approximate human-like behaviour, indicating that effective negation processing might depend on pragmatic reasoning and discourse sensitivity acquired through dialogic experience.