The system works because it's relying on the fact that different people have different thresholds for accepting candidates, not despite it. It's still consiste

The system works because it's relying on the fact that different people have different thresholds for accepting candidates, not despite it. It's still consistent in that in any case, the candidates you're approving of are all preferable (for you) to all of the candidates you're not. There's no ambiguity.