 Sentence (59) intuitively is true iff for every book that a credit-card owner buys on amazon.com, there is some credit card or other that she uses to pay for the book. Hence the mixed strong and weak reading. Brasoveanu accounts for these readings, along with the weak/strong ambiguity in general, within his system of Plural Compositional Discourse Representation Theory (PCDRT) by positing an ambiguity at the level of indefinites. In his account, indefinites are underspecified as to the presence of a maximization operator (which is present in the strong indefinite but not the weak); the decision of which indefinite to use in a specific case is a “context-driven online process”.