Premise: Harold is a structure used in longform improvisational theatre. Developed by Del Close and brought to fruit through Close's collaboration with Charna Halpern, the Harold has become the signature form of Chicago's iO Theater and the Upright Citizens Brigade Theatre in New York City and Los Angeles. It is now performed by improv troupes and teams across the world.
Hypothesis: Harold, in this context, is not a name for an individual person