The story
From ex- + intelligence (contrasted with knowledge carried within the brain, as if intelligence were derived from in). Coined by Ian Stewart and Jack Cohen in their book Figments of Reality (1997).
Etymology from Wiktionary, CC BY-SA 4.0.
extelligence
Today it means: All the cultural capital that is available to people in the form of tribal legends, folklore, nursery rhymes, books, videotapes, CD-ROMs etc. Full definition →