That's true but as you see, whether or not the other party argues from that understanding is difficult to identify from a single sentence. I understand that it

That's true but as you see, whether or not the other party argues from that understanding is difficult to identify from a single sentence. I understand that it being convinced of something or not is a false dichotomy. However, there's a difference between objective reality and knowledge: Either the phenomenon was absent or not -- that's a fact. Whether or not we are convinced of it being absent or not is the other question.