Crosslinguistically, many degree modifiers also act as modifiers of the
common ground, either synchronically or diachronically. Despite this
pattern, the two are often modeled quite differently. Using the English
negative polarity item (NPI) *at all*, I show that a degree-based semantics
for both degree modifiers and common ground (CG) operators can capture the
parallelism between the two and account for *at all’*s status as an NPI.