Ineed asap in a medieval poem titled sir gawain and the green knight, the green knight addresses king arthur as "thou." this usage is given their differences in rank. respectful innapropriate

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Yet before the narrator goes any further in the tale, he describes the circumstances and the social rank of each pilgrim. He describes each one in turn, starting with the highest status individuals. Chaucer's voice, in re-telling the tales as accurately as he can, entirely disappears into that of his characters, and thus the Tales operates almost like a drama. Where do Chaucer's writerly and narratorial voices end, and his characters' voices begin? This self-vanishing quality is key to the Tales, and perhaps explains why there is one pilgrim who is not described at all so far, but who is certainly on the pilgrimage - and he is the most fascinating, and the most important by far: a poet and statesman by the name of Geoffrey Chaucer.

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