  We show that the oblique confinement states in the Cardy-Rabinovici model are
superinsulators, not topological insulators. This is because their only bulk
excitations are strings that completely prevent the separation of
charge-anticharge pairs, causing a strictly infinite resistance (below a
critical temperature and/or voltage). This is very different from the typical
activated behaviour of topological insulators, caused by a finite bulk energy
gap.
