Forum:Proper usage of 'Sith'

When dooku trains asajj ventress in one of those animated series, i remember him saying 'but you are not sith, for sith have no fear.' Shouldn't it be a sith. Is it just an error, or is it how it's meant to be used? The only way i can think of where there shouldn't be an a would be if he was referring to the species, but in which case dooku was not a sith either. Soresumakashi 01:05, 15 July 2008 (UTC)