Does ‘a couple’ pattern with scalars or numbers - Insights from inference and ‘so’ tasks

Previous research establishes that paucal quantifiers like ‘a couple’ are ambiguous between the literal meaning of ‘at least two’ and the enriched meaning understood as conveying a restriction on quantity, the latter of which can be explained by a pragmatic phenomenon, i.e. scalar inference (SI). To address whether this ambiguity patterns with that of scalars or numbers, our Experiment 1 explored the behaviours of ‘a couple’ and scalars with two types of probe questions in inference tasks, and Experiment 2 continued this theme by testing the naturalness rating for ‘a couple’ and scalars in an ‘X so not Y’ construction. The results of our experiments indicate two natures of ‘a couple’: a non-monotonic /cardinal (approximately two) and proportional (a small proportion of).