 (11) is meaningful, and certainly not true. Russell takes it to be plainly false, though that is controversial (see Strawson (1950) and, more recently, Von Fintel (2004)). Regardless, if one thinks that definite descriptions are devices of reference, then it’s unclear how one will be justified in claiming that sentences like (11) are meaningful. After all, the description clearly doesn’t refer. With (12), the problem facing the referentialist is different: since both these descriptions should refer to the same individual, Mary Ann Evans (or ‘George Eliot’), it becomes highly unclear why (12) shouldn’t be knowable apriori. As with identity statements involving co-referring names, this looks to be merely an instance of the law of self-identity.