Georgiev's thesis has by no means achieved general acceptance: the Thraco-Dacian theory retains substantial support among linguists. Crossland (1982) considers that the divergence of a presumed original Thraco-Dacian language into northern and southern groups of dialects is not so significant as to rank them as separate languages. According to Georg Solta (1982), there is no significant difference between Dacian and Thracian. Rădulescu (1984) accepts that Daco-Moesian possesses a certain degree of dialectal individuality, but argues that there is no fundamental separation between Daco-Moesian and Thracian. Renfrew (1990) argues that there is no doubt that Thracian is related to the Dacian which was spoken in modern-day Romania before that area was occupied by the Romans. However, all these assertions are largely speculative, due to the lack of evidence for both languages.