The term "reverser" is applied to a position whose importance is set to 100, that is driven by a bias (fixed 100% supporting argument) and an objecting argument (or blocker).
In this case, when the objecting argument is 0, the bias drives the output (modified value) to 100. And as the objecting argument increases, the modified value decreases. With only one bias input and one objecting argument input, the output is linear.
In this example we have added the "INPUT" position and "OUTPUT" position just so we can show the "Reverser" logic in the middle.
Observe the impact of driving the "INPUT" on the "Reverser"; and the impact of the "Reverser" on the "OUTPUT".