This article presents a reading-time study of scope resolution in the interpretation of ambiguous cardinality interrogatives in English-French and in English and French native sentence processing. Participants were presented with a context, a self-paced segment-by-segment presentation of a cardinality interrogative, and a numerical answer that respondents either accepted or rejected. Very narrowly distributed and interpretation-dependent reading-time asymmetries arose in English-French processing and in French and English native processing. A syntactic account of scope resolution characterizes the reading-time asymmetries produced by English-French learners and differences between French and English native respondents. In contrast, a context-driven theory of scope resolution encounters many severe problems that render its plausibility exceedingly remote.