R0050/2026-03-31-02/Q002/SRC01/E01¶
Legal standards of proof form a six-tier calibrated hierarchy with empirical probability estimates
URL: https://judicature.duke.edu/articles/legal-standards-by-the-numbers/
Extract¶
Survey of 124 judges (2007-2012) quantified six legal standards of proof:
| Standard | Mean Probability | Std Dev |
|---|---|---|
| Reasonable Articulable Suspicion | 42.1% | 22.5 |
| Probable Cause | 49.7% | 16.6 |
| Preponderance of the Evidence | 54.4% | 5.4 |
| Substantial Probability | 55.3% | 17.6 |
| Clear and Convincing Evidence | 73.4% | 10.6 |
| Beyond a Reasonable Doubt | 90.1% | 7.0 |
Novel concept: Consequence-calibrated proof thresholds. The legal system explicitly ties the required evidence standard to the severity of consequences. Criminal cases (possible imprisonment) require beyond a reasonable doubt (~90%). Civil cases (monetary damages) require only preponderance (~54%). This principle — that higher-consequence decisions demand higher evidence thresholds — is not formally articulated in ICD 203 or any of the nine reference frameworks.
Novel concept: The burden of proof shifts between parties. In law, the party making a claim bears the burden of proof. This is procedurally formalized in ways not found in the reference frameworks.
Relevance to Hypotheses¶
| Hypothesis | Relationship | Strength |
|---|---|---|
| H1 | Strongly supports | Legal standards are formal, structured, and contribute novel concepts |
| H2 | Contradicts | Legal contributions are clearly novel, not redundant with reference set |
| H3 | Strongly contradicts | Legal standards are unambiguously formal |
Context¶
The comparison with ICD 203's seven-point scale is instructive. Both map verbal categories to probability ranges. But the legal system explicitly calibrates the required threshold to the consequences of error, while ICD 203 calibrates language to analyst confidence. The legal innovation is connecting evidence threshold to decision stakes.