Lady Justice weighs. Drag the evidence onto the pans — for and against — and the beam tips toward the heavier side. But how far it must tip before you act depends on the stakes: a nudge past even, for a civil claim; far past, and beyond a reasonable doubt, before you take the blade to someone's liberty.
The pans sum the evidence weights you drag onto them; the beam's tilt is proportional to the difference, and the 'confidence for' is weight_for/(weight_for+weight_against). The verdict threshold is explicit and switchable: balance of probabilities (>50%, civil) vs beyond reasonable doubt (~90%, criminal) — the SAME evidence can win a civil claim and fail a criminal one, exactly as the readout shows. A verdict is a threshold on weighed evidence, and the threshold rises with the stakes.
Evidence as a single additive weight is a drastic simplification — real proof is not summable, weights are contested, and 'beyond reasonable doubt' is deliberately NOT a number (the ~90% is illustrative). The honest core — a verdict is a threshold on the balance of evidence, and that threshold is higher when someone's liberty is at stake — is the real content.