“[Walter Lippmann] applied the term “stereotype” to what he called “the pictures in our heads”—impressions that reflect subjective perceptions but stand in for objective reality. The word comes from the old typesetting process, in which a mold of a message is cast on a metal plate and replicated in the printing process again and again—mimicking the unchecked spread of ideas that we only presume to be true. Those ideas then dictate how we interpret what we see.”