How it works:
>Statement made based on logical reasoning. Whether fact or simply a drawn conclusion is irrelevant, the statement itself is made.
>Someone with information to say otherwise presents it as such as a counterpoint. "This is inaccurate. Allow me to demonstrate why"
Even going beyond the original two people debating, a third observer can come in and gain knowledge as to why the point was made, and why it was proven false (if it was).
How it does not work:
>"lolwut, not only are you wrong but you don't even know"
Is this the part where we try again? Or is this the part where you sit back down?