What the rule patterns actually did — hits and misses
A retrospective study over 1,156 historically resolved Polymarket markets: for each rule pattern, how often markets carrying it actually resolved disputed, voided, or ambiguous, versus the 17.6% base rate. Every figure below is recomputed from the engine's own grading data (last recomputed July 16, 2026) — including the patterns that don't predict risk.
Retrospective backtest on resolved markets — not a live trading recommendation, not prospective performance
| Rule pattern | Fired on | Observed problem rate | Wilson 95% interval | Lift vs base |
|---|---|---|---|---|
| Legal-challenge / recount / appeal language | 22 | 77.3% | 57–90% | 4.4× |
| Multiple qualifying outcomes ("first of", "either") | 48 | 60.4% | 46–73% | 3.4× |
| Conflicting resolution sources ("X or Y") | 11 | 54.5% | 28–79% | 3.1× |
| Title / rules mismatch | 56 | 26.8% | 17–40% | 1.5× |
| Explicit cancellation clause (assumed risky — measured protective) | 388 | 3.9% | 2–6% | 0.2× |
| Generic "ambiguous language" (assumed risky — measured protective) | 224 | 8.5% | 5–13% | 0.5× |
Sample, exclusions and what "inconclusive" means
The dataset contains 1,235 closed markets pulled from the public Polymarket record; 79 were excluded as unobservable (their final resolution quality could not be established either way — the honest "inconclusive" bucket), leaving 1,156 graded markets. The base problem rate across them is 17.6%. Small per-pattern samples carry wide intervals — that is why every row shows its n and a Wilson 95% interval instead of a bare percentage. The engine grades 11 rule patterns in total; the 5 not shown above measured no reliable signal in either direction on current samples — we publish the count so the table above can't be mistaken for a curated highlight reel.
Does the composite model beat guessing?
Yes, out-of-sample. Graded on a held-out split, the fitted model reaches a Brier score of 0.119 vs 0.149 for a constant base-rate baseline, and beats the category, segment and rules-only baselines as well — verdict MODEL_BEATS_BASELINES. That's a modest, honest edge over guessing the base rate, not a crystal ball. Method: Methodology → the model.
Retrospective, not prospective
Everything on this page is measured on markets that already resolved — it shows the patterns were real in the past, not that any future market obeys them. We publish no forward performance claims, no avoided-loss figures, and no cherry-picked wins. The honest use of this page: it tells you which rule patterns have historically deserved your attention before you commit to a thesis.
How to verify this yourself
Run a live Resolution Watch on any market you hold: it quotes the exact rule fragment behind every flag, so a deterministic finding is checkable against the market's own text in seconds. The associations above are one historical dataset (dated, with intervals) — association, not proof of causation.