EVENT VISIBLE
A short PM2.5 excursion is preserved at native time resolution.
EIG DEMONSTRATION 004 · R1 · TIME-RESOLUTION FAILURE
When the average
erases the event.
A measurement can be mathematically correct and still be evidentially inadequate for a different proposition. This demonstration tests whether temporal aggregation is allowed to conceal a short-duration particulate event that may matter to the consequence under review.
NON-CLAIM: This demonstration does not establish a medical diagnosis, individual health causation, a universal PM2.5 safety threshold, or that every transient excursion requires intervention. It governs preservation and use of time-resolved evidence.
SIGNAL REDUCED
The same excursion is diluted by surrounding lower measurements.
EVENT OBSCURED
The transient event may disappear inside an apparently ordinary daily value.
GOVERNANCE FAILURE CONDITION
Aggregation cannot silently substitute for the evidence resolution required by the proposition.
If the governed question concerns whether a short-duration environmental event occurred, a daily average cannot be treated as though it answered that question merely because it was calculated correctly. The native event record, aggregation method, time window, missingness, instrument identity, context, and intended consequence must remain distinguishable.
Requires time resolution capable of preserving the event.
May properly use an explicitly declared aggregation window.
Requires proposition-specific admissibility, authority, context, and present standing.
Requires revalidation before stale evidence crosses Commit.
Averages answer questions about averages. They do not automatically answer questions about events.