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.[13] Other scholars such as Sten Konow, Richard Pischel and Alfred Hillebrandt disagree with Bloch.[15] 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.[14] Another explanation is that the extant Prakrit manuscripts contain scribal errors.