I'm not sure if by this you mean (a)the participants in the debate arrive at a clearer understanding of their own position, or (b)the participants arrive at a clear understanding of their opponents position, or (c)the participants arrive at the same clear biblical position.
Ideally, that that could arrive at a correct, clear, mutually agreed upon biblical position.
That being a bit utopian, the fall back would be the definition of resolution...agreement that they've gotten as far as they're likely to get.