to Dandin's Kavya-darsha, was prevalent in the Maharashtra region, and in which poems such as Ravana-vaho (or Setubandha) were composed. According to Sanskrit and Prakrit scholar Sh. Shreyansh Kumar Jain Shastri and A. C. Woolner, the Ardhamagadhi (or simply Magadhi) Prakrit, which was used extensively to write the scriptures of Jainism, is often considered to be the definitive form of Prakrit, while others are considered variants of it. Prakrit grammarians would give the full grammar of Ardhamagadhi first, and then define the other grammars with relation to it. For this reason, courses teaching 'Prakrit' are often regarded as teaching Ardhamagadhi. Grammar Medieval grammarians such as Markandeya (late 16th century) describe a highly systematized Prakrit grammar, but the surviving Prakrit texts do not adhere to this grammar. For example, according to Vishvanatha (14th century), in a Sanskrit drama, the characters should speak Maharashtri Prakrit in verse and Shauraseni Prakrit in prose. But the 10th century Sanskrit dramatist Rajashekhara does not abide by this rule. Markandeya, as well as later scholars such as Sten Konow, find faults with the Prakrit portions of Rajashekhara's writings, but it is not clear if the rule enunciated by Vishvanatha existed during Rajashekhara's time. Rajashekhara himself imagines Prakrit as a single language or a single kind of language, alongside Sanskrit, Apabhramsha, and Paishachi. German Indologist Theodor Bloch (1894) dismissed the medieval Prakrit grammarians as unreliable, arguing that they were not qualified to describe the language of the texts composed centuries before them. Other scholars such as Sten Konow, Richard Pischel and Alfred Hillebrandt disagree with Bloch. It is possible that the grammarians sought to codify only the language of the earliest classics of the Prakrit literature, such as the Gaha Sattasai. Another explanation is that the extant Prakrit manuscripts contain scribal errors. Most of the surviving Prakrit manuscripts were produced in a variety of regional scripts during 1300–1800 CE. It appears that the scribes who made these copies from the earlier manuscripts did not have a good command of the original language of the texts, as several of the extant Prakrit texts contain inaccuracies or are incomprehensible. Also, like Sanskrit and other ancient languages Prakrit was spoken and written long before grammars were written for it. The Vedas do not follow Panini's Sanskrit grammar which is now the basis for all Sanskrit grammar. Similarly, the Agamas, and texts like Shatkhandagama, do not follow the modern Prakrit grammar.