Una precisazione a proposito della legge Tobler Mussafia e dei pronomi clitici soggetto

Some influential studies about medieval northern Italian dialects argue that if a subject pronoun occupies the first position in a sentence it should not be regarded as clitic, because of the Tobler Mussafia law. However, evidence suggests that Tobler Mussafia law did not apply to subject clitic pronouns, but only to object ones. It is therefore worth inquiring when a subject pronoun may be seen as clitic in medieval northern Italian dialects: four criteria are set forth.