The Detective’s DeskLars Hart
Proposed deduction
“Receipt is at 13:27.”
MEDIUM · CASE FILE
One message, two delays
Medium · GLASSHOUSE SIGNAL OFFICE
A signal may leave only after both independent checks finish. Four technicians calculated its earliest receipt. Also reconstruct the review register: it records who examined which source, independently of whether their later proposed answer is correct. Review slots describe order, not travel or clock times.
Read the case file below, or open the interactive desk to examine records, keep notes and submit your reasoning. These are the case materials, without the solution.
Your assignment
Who found the earliest receipt time?
- The analytical records answer the analytical question; worksheet records establish the review reconstruction. Candidate proposals and supplementary recollections are claims to test.
- There are 2 ordered events. Use each listed person and item once in its column. “A immediately before B” means A is in the row directly above B, with no row between them.
- 4 verified records support the complete submission. Keep the separate context note out of the proof.
- No outside facts or unstated exceptions are required. The complete board and report are assessed together.
People and accounts
Mila Reed
Proposed deduction
“Receipt is at 13:14.”
Nate Shore
Proposed deduction
“Receipt is at 13:13.”
Kemi Ward
Proposed deduction
“Receipt is at 13:19.”
Case records
Read each record on its own terms. A claim made by a person is different from a fact established by an independent record.
PRIMARY RECORD
Readiness checks
At 13:00, a battery check lasting 8 minutes and an antenna check lasting 13 minutes began together. Transmission must wait for both to finish.
The longer parallel check controls readiness.
LINKED RECORD
Signal line
Once ready, transmission begins immediately and takes 6 minutes. Receipt uses the same accurate clock.
This adds a serial stage after readiness.
CONTEXT NOTE
Signal format
The message contains only the word READY.
Its format does not change the specified line duration.
RECONSTRUCTION RECORD
Review register
This is the same investigation’s document review record. There are 2 ordered events, labelled Review 1, Review 2. Each listed person and item occurs exactly once. These slots describe record order, not times from the analytical problem.
- The event reviewed by Nate Shore occupies slot 1 (Review 1).
Use each column’s choices exactly once. Verified relationships govern the board; proposed answers and later recollections do not override them.
RECONSTRUCTION RECORD
Review cross-check
The relationships below were verified independently. “A immediately before B” means A is in the row directly above B, with no row between them. Keep relationships from all worksheet sources together.
- The event involving “Readiness checks” occupies slot 2 (Review 2).
Use each column’s choices exactly once. Verified relationships govern the board; proposed answers and later recollections do not override them.
Questions to resolve
Match every recorded item to its handler or reviewer.
- Signal line
- Readiness checks
When was the primary analytical record reviewed?
Use the interactive case desk to select your finding and cite the records that support it. The answer is checked there, and your progress stays in your browser.
Build your finding
Compare the records with each account. Work out what the evidence establishes, then separate that finding from anything it does not prove.