TIME LAYERS / APU022
Time Layers lets APU place verified temporal anchors beside one another while refusing to fill the space between them with plausible-looking history. A layer exists only because APU007 Time already contains the event.
Every Lab tool now uses the same context convention: an optional worked-example key travels in the URL, help is visible in native disclosure controls, and reset returns to the canonical tool route.
Worked-example context is optional and URL-scoped. Enter from the Harbor Light synthetic journey to carry that example between tools, or use any tool without a case key.
Context is explicit and URL-scoped. The Expedition layer does not create an account profile, hidden personalization state, analytics event, or factual assertion. A ?case=harbor-light key only keeps the same synthetic teaching example visible as you move between tools. Reset by returning to this tool's base route.
01 / EVIDENCED LAYERS
Current lifecycle is context only. Each displayed layer resolves to an existing timeline event ID and preserves its original date precision.
Current lifecycle context: Extant. This label does not create a dated state.
3 evidenced event anchors. No intermediate conditions inferred.
Current lifecycle context: Unbuilt. This label does not create a dated state.
2 evidenced event anchors. No intermediate conditions inferred.
02 / THEN–NOW FRAMEWORK
A pair can establish that two evidenced event anchors exist. It cannot establish the visual difference between them unless that difference is independently evidenced.
Difference claim: Insufficient Evidence. The Time system proves an alteration event exists in the 1990s fixture decade. It does not state what physical condition changed.
Difference claim: Not A Built Condition. This pair is a project-status sequence, not a claim that a built place existed between the two events.
03 / MEDIA ROLES
Documentary media, reconstructions, generated illustration, and diagrams are different evidence classes. They must never collapse into one another.
may-support-observed-condition
Generated allowed: no
interpretive reconstruction, never documentary photograph
Generated allowed: yes, with role limits
illustrative only; cannot establish historical condition
Generated allowed: yes, with role limits
explanatory structure only; source evidence remains authoritative
Generated allowed: yes, with role limits
04 / UNKNOWN LEDGER
No image pair exists for these fixtures. No physical alteration details are supplied. The unbuilt sequence never becomes a built-condition comparison.
0 inferred.
0.
0 authored from imagery.
0. This is a derived Lab view.
05 / ACCESSIBLE EVIDENCE
The state and pair tables preserve IDs, date precision, sources, and uncertainty without requiring imagery.
| Entity | Date | Event | Precision | Origin | Sources |
|---|---|---|---|---|---|
| Fixture Observation Tower | 1961 (fixture) | Construction started | Year | apu007_time | apu:source:apu001-fixture-spec |
| Fixture Observation Tower | 1964 (fixture) | Completed | Year | apu007_time | apu:source:apu001-fixture-spec |
| Fixture Observation Tower | 1990s (fixture) | Altered | Decade | apu007_time | apu:source:apu001-fixture-spec |
| Fixture Sea Arcology | 1973 (fixture) | Proposed | Year | apu007_time | apu:source:apu001-fixture-spec |
| Fixture Sea Arcology | 1976 (fixture) | Cancelled / not realized | Year | apu007_time | apu:source:apu001-fixture-spec |
| Pair | Entity | Earlier event | Later event | Media | Difference status | Authored difference claims |
|---|---|---|---|---|---|---|
| Completed → altered | Fixture Observation Tower | apu:timeline:fixture-observation-tower-completed-01 | apu:timeline:fixture-tower-alteration | Unavailable | Insufficient Evidence | 0 |
| Proposed → cancelled | Fixture Sea Arcology | apu:timeline:fixture-arcology-proposal | apu:timeline:fixture-arcology-cancellation | Unavailable | Not A Built Condition | 0 |