Julia stands up to Sister Luke in "Blue." What does she say to Sister Luke? What gives Julia the confidence to do this?

Julia has been given permission by Dr. Lynn to care for her patients as she sees fit. This gives Julia the confidence to tell Sister Luke she does not find poultices for chest cases like Honor White's to be beneficial. When Sister Luke responds that poultices work if done correctly, Julia boldly retorts that since they are so short-staffed, she will have to use her own good judgement.