Anastasia Giannakidou is the Frank J. McLoraine professor of linguistics at the University of Chicago. She is the author of Polarity Sensitivity as Nonveridical Dependency and coeditor, inter alia, of Mood, Aspect, Modality Revisited, also published by the University of Chicago Press. Alda Mari is CNRS Director of Research at Institut Jean Nicod at Ecole Normale Supérieure, EHESS and PSL, in Paris. She is the author of two books in French and the coeditor of Genericity.