Spoken yeses are not a guest list
By the time a graduation is announced, the phone has done most of the inviting. An uncle says he and his wife will come, a cousin promises the whole family, a grandparent asks whether the children are included. None of this is written anywhere, so it lives in three people's memories and quietly disagrees with itself.
A guest list exists to turn those conversations into a single honest number. You build it once from who has actually been invited, and from then every reply — yes, no, plus-one, a note — attaches to a name you already recognised. The ceremony seat count, the caterer, and the anxious question of whether there is room for an aunt's side all resolve against that one list.