disjunction

A disjunction may be a mere lack of connection between two things, or a large gulf. There's often a huge disjunction between what people expect from computers and what they know about them, and the disjunction between a star's public image and her actual character may be just as big. We may speak of the disjunction between science and morality, between doing and telling, or between knowing and explaining. In recent years, disjunction seem to have been losing out to a newer synonym, the noun disconnect.