ladypine: Small confidence values are hardly ever dominated by a single edge, they're usually a more overall network effect. Very small confidence values are good log-scale indicators of how indirect and tenuous your certification of that node is. If your path to certifying someone as bad is much more tenuous than your path to certifying them as good, you want to weight them near one, and in the opposite case you want to weight them near zero, which is exactly what the formula I gave does.