Freshness first
Age is checked before price. An old observation contributes nothing to quorum or consensus.
Independent observations. Explicit policy. Inspectable outcome.
Turn noisy feeds into one auditable trigger.
Change the evidence, predict the decision, and see exactly how freshness, deviation, median consensus, and quorum determine whether a contract can act.
The decision surface
Test what a contract can trust, not just what a feed reports.
This local educational calculator uses a pinned statistics library. It does not connect to WINkLink, attest source integrity, or submit a transaction.
SIMPLE-STATISTICS 7.8.8 READY
Worked example computed from five observations.
Independent observations
Edit the evidence
Read the causal chain
A feed becomes actionable only after every earlier gate survives.
Robust center
The fresh-value median gives one extreme report less leverage. Values outside tolerance are rejected.
Quorum before trigger
A high consensus cannot authorize execution unless enough independent observations remain accepted.
Worked reasoning
One bad price does not become the price.
The $101.25 observation is stale. Among fresh values, $108.90 sits more than 1% from the initial median and is rejected. The remaining $101.10, $101.20, and $101.35 values produce a $101.20 consensus: exactly enough accepted sources, exactly at the trigger.
Reasoning carousel
Freshness changes eligibility
A stale observation is not a weak vote. Under this policy it is no vote at all.
1 / 3
Quick assessment
Two fresh feeds clear the trigger. Quorum requires three. What happens?
Choose an outcome, then connect it to the gate order.
Misconception
"Median means truth."
Median is a robust aggregation rule over supplied inputs. It does not prove the providers or external event are trustworthy.
Transfer
Defend a different policy.
Replace the sample, choose the four thresholds, and use the evidence export to explain one rejection and the final action.
Boundary
Local policy, not a live oracle.
No feed identity, cryptographic proof, chain transaction, or WINkLink service is integrated or implied.