Though now we control for confounding variables, it is less clear, what it implies for the genre model. It is not unusual in genre theory to conceptualize genre in an ideal way as independent of other factors like authorship, time, publisher etc. which corresponds to the ‘strict’ version of splitting train and test data. But at the same time, these factors may be so intertwined with the genre features, that it is difficult, if not impossible to separate them at all (Hempfer 2010). Under this perspective our attempt to construct a ‘clean’ and strict model of genre, independent of publishers etc. is a misguided attempt.