Goals of rational discourse

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The goals of rational discourse are, with rule #2 taking precedence:
 * 1) improved common understanding
 * 2) * i.e. a higher level of agreement between individuals about the nature of reality
 * 3) a better understanding of reality
 * 4) * i.e. a more accurate understanding of reality itself, on the part of either participant (preferably both, in accordance with rule #1)