What two speeches in policy debate make up the “negative block”?

i would like to compare these two interpretations of the crucible : 1) eric christ's interretation and wade bradford's interpretation. the main differences between there interretaions is that in the first one you can notice direct link to joseph mccarthy whereas the second one represents how the town is filled with hysteria.the second interpretation shows that author believes that the story   about puritan town in salem is based on actual events while the first example shows the sencible reference to sort of bias.

b : the uninhabited house represents the narrator's feeling of emptiness.

c: the blind street symbolizes the aimless and drab life on north richmond street.

d: the consciousness of decent lives symbolizes a comparison of neighbors' lives.

they have to destroy the colonized people's culture, including their literature and language.