I do not know. I do not know. I do not know.
My only guess is they can’t think of anything foul to say at the time, so they stall by repeating. It’s also probably meant to sound more intimidating by not letting the other person speak. The repeated idiocy flummoxes the recipient.
Should I say it again? Should I say it again? Should I say it again?
Maybe neither of you have ever tried to intelligently discuss something with a minimal intellect person. They stonewall you until you give up by the constant repetition of the same thing. Eventually many of us just never try in the first place. Being in a management position with these persons is almost hell on earth.