'I—I—don't know.' 'You—you—don't know?' mimicking my drawling manner of speech. 'What DO you know?' 'I—I—nothing, for certain.'
What is the significance of Bixby mocking the narrator’s speech? It reflects his low opinion of the narrator’s intelligence and social standing. It shows his desire to make others feel inferior. It suggests a deep insecurity within Bixby’s character. It illustrates Bixby’s wish that the narrator speak without a drawl.