base rate:
Historical base rate for a justice aged 77-80 retiring within a 3-year window is approximately 20%. Strategic retirements during politically favorable administrations (Kennedy 2018, Breyer 2022, O'Connor 2005) suggest this rate could be higher when conditions align, perhaps 25-30%.
evidence updates:
Strong downward pressure from: (1) Thomas personally denying retirement rumors, (2) hiring clerks for upcoming terms, (3) Trump publicly discouraging resignation, (4) no credible signals or reporting since late 2024. Moderate upward pressure from: (1) strong political logic with 53-seat GOP Senate, (2) advancing age (will be 80+ by end of window). The downward evidence is more concrete and recent than the upward evidence, which is more structural/theoretical.
combination method:
Weighted average of sub-questions with adjustment for correlated negative signals. The sq3 finding (no credible signals) is particularly informative as a near-term predictor, but the 3-year window means conditions could change substantially.
final:
Despite strong structural political motivation, the concrete evidence overwhelmingly points against near-term resignation: Thomas denies it, Trump discourages it, no credible signals exist, and clerks are hired. The main risk is health deterioration or a sudden change of heart, particularly if the 2026 midterms threaten to flip the Senate. Estimated probability: 25%.
ensemble:
{'ensemble_count': 3, 'perspectives': {'base_rate': {'p_yes': 0.25, 'confidence': 0.45}, 'evidence_driven': {'p_yes': 0.27, 'confidence': 0.55}, 'contrarian': {'p_yes': 0.28, 'confidence': 0.45}}, 'spread': 0.03, 'individual_p_yes': {'base_rate': 0.25, 'evidence_driven': 0.27, 'contrarian': 0.28}}