Define the two content phases
Synthetic registration phase is 09:00–12:00, followed by recap-request phase 12:00–18:00, all half-open. Message REG invites registration; REC requests a recap copy. At 12:00 the registration route is no longer offered under local policy, while REC is eligible. These are fictional content phases, not actual platform enforcement.
| Release time | Phase | Message |
|---|---|---|
| 11:59 | Registration | REG |
| 12:00 | Recap request | REC |
| 18:00 | Outside both | None |
Classify the release instant
- Read both phase boundaries
- Match proposed release instant
- Choose REG or REC accordingly
- Hold outside-window messages
A late queued REG cannot be relabelled REC without changing its actual action text and destination.
Which message fits exactly 12:00 and how many phases include that instant?
Show the worked answer
REC; one phase includes 12:00. Half-open boundaries avoid both messages claiming the same cutoff instant.
Select the matching message/action
| Case | Decision or result | Reason |
|---|---|---|
| REG at 12:00 | Reject | Registration ended |
| REC at 12:00 | Eligible | Recap phase begins |
Keep phase-specific action and destination together. Switching a schedule label alone does not update the visible campaign message.