There are times when a member of an older generation mentions something they consider obvious, only to see a glaze form across the face of a member of a younger generation’s. The reference has gone completely over her head. As a child, when I told my parents I hadn’t heard of something, their response would usually be, “So what are they teaching you in school?” This is not to condemn the education I received, but a genuine inquiry: why there are certain surprisingly specific gaps in my knowledge?