response: Yeah, I think cardigans that don't have buttons would be considered robes.
history: i wear cardigans because i hope it makes me look more cultured .) Oh, is that so? Cardigans are the sweaters with the open front, right? from what I understand, Cardigans have buttons, to distinguish from others
knowledge: Commonly cardigans have buttons: a garment that is tied is instead considered a robe.