[...] The idea that there is a single 'normal' language, a common currency shared equally by all members of society, is an illusion. Any actual language consists of a highly complex range of discourses, differentiated according to class, region, gender, status and so on. which can by no means be neatly unified into a single homogeneous linguistic community. [...] Even the most 'prosaic' text of the fifteenth century may sound 'poetic' to us today because of its archaism. If we were to stumble across an isolated scrap of writing from some long-vanished civilization, we could not tell whether it was 'poetry' or not merely by inspecting it, since we might have no access to that society's 'ordinary' discourses; [...] We would not be able to tell just by looking at it that it was not a piece of 'realist' literature, without much more information about the way it actually functioned as a piece of writing within the society in question.