There is no "debate" or "discussion". There is no "trading" arguments.
Human beings implement behavior that is for most parts full of logical fallacies and sometimes just paradox in itself for no apparent reason. One of them being that human beings cannot clearly "enough" distinguish between a message and the messenger "telling" it. Seemingly automatically, the value they put on the message is linearly related to the "value" they put on the messenger and vice versa. This "natural" gap in face-to-face communication only can be narrowed by applying high-order behavior, but seemingly never be closed completely.
Communicating over a pure text-interface or even a telephone narrows the "channels" (observing the non-verbal communication levels, e.g.) even more.
So misconceptions and -understandings are even increased in their impact of actual information exchange in the dialogue in question.
So it is conclusive to assume there only exists dialogue between human beings. Or dialogues between human beings with applied group dynamics.
there doesn't seem to be anything here