 The presence of both is evident in the poem, as well as the presence of Charon.The poem is called a παραλογή ("paralogē", "illogic") as its theme is supernatural, featuring a dead person resurrecting for some time to fulfil an oath, and birds speaking with human voice.Another well-known medieval "paralogē" is the song of the Bridge of Arta, a bridge whose foundations would not stand unless the master builder buried his own wife within the masonry.