The paper discusses impersonal passives in Dutch and their theoretical implications, focusing on the debate between the advancement and demotion analyses of passive constructions. Impersonal passives are passive sentences where the subject is not explicitly mentioned, and the verb is in the past participle form with the auxiliary verb 'worden'. The paper argues that impersonal passives universally involve a dummy subject that advances from the second to the first stratum, a phenomenon known as the advancement analysis. This analysis is contrasted with the demotion analysis, which posits that passive constructions involve a demotion of the first element. The paper also explores the Unaccusative Hypothesis, which posits that certain intransitive clauses have an initial second element but no initial first element. The paper argues that the Unaccusative Hypothesis, combined with the l-Advancement Exclusiveness Law, supports the advancement analysis of impersonal passives. The paper provides evidence from Dutch and Turkish to support this argument, showing that impersonal passives of initially unaccusative clauses are ungrammatical. The paper concludes that the advancement analysis of impersonal passives is supported by empirical data and theoretical principles of universal grammar.The paper discusses impersonal passives in Dutch and their theoretical implications, focusing on the debate between the advancement and demotion analyses of passive constructions. Impersonal passives are passive sentences where the subject is not explicitly mentioned, and the verb is in the past participle form with the auxiliary verb 'worden'. The paper argues that impersonal passives universally involve a dummy subject that advances from the second to the first stratum, a phenomenon known as the advancement analysis. This analysis is contrasted with the demotion analysis, which posits that passive constructions involve a demotion of the first element. The paper also explores the Unaccusative Hypothesis, which posits that certain intransitive clauses have an initial second element but no initial first element. The paper argues that the Unaccusative Hypothesis, combined with the l-Advancement Exclusiveness Law, supports the advancement analysis of impersonal passives. The paper provides evidence from Dutch and Turkish to support this argument, showing that impersonal passives of initially unaccusative clauses are ungrammatical. The paper concludes that the advancement analysis of impersonal passives is supported by empirical data and theoretical principles of universal grammar.