AbstractThree experiments investigated the processing of the implicature associated withsomeusing a “gumball paradigm.” On each trial, participants saw an image of a gumball machine with an upper chamber with 13 gumballs and an empty lower chamber. Gumballs then dropped to the lower chamber and participants evaluated statements, such as “You got some of the gumballs.” Experiment 1 established thatsomeis less natural for reference to small sets (1, 2, and 3 of the 13 gumballs) and unpartitioned sets (all 13 gumballs) compared to intermediate sets (6–8). Partitivesome ofwas less natural than simplesomewhen used with the unpartitioned set. In Experiment 2, including exact number descriptions lowered naturalness ratings forsomewith small sets but not for intermediate size sets and the unpartitioned set. In Experiment 3, the naturalness ratings from Experiment 2 predicted response times. The results are interpreted as evidence for a Constraint‐Based account of scalar implicature processing and against both two‐stage, Literal‐First models and pragmatic Default models.