[zabaki]

I understand your point. But my "nod" is something that might be common for Scandinavians, as it is something we do while the other part is communicating.

So, as they make their point through a sentence, I nod/concur with the statement they made to show I understand and do not have a question regarding the statement (sometimes I would need clarification to fully grasp their point). After they are done I respond with either counter-argument or continue the conversation.