A lot of ppl are pressed for Affirmation. So i started doing it because of that, or ppl call yo name out like you supposed to be best buds but in reality, "I don't like ya, Ive never liked ya, if I saw ya on the street, id walk to the other side or id go another way". So i would use it to say, "Yes, even though I dont f with you, I am acknowlegding that you said hello and this is me sayign hello back. I don't know why this a big deal because we aint never gonna be friends and this just a place I work."