The Detective’s DeskFara Reed
Proposed deduction
“The earliest finish is 09:44.”
MEDIUM · CASE FILE
A frame ready for opening
Medium · FERN RESTORATION LAB
The lab must finish two repairs before a final assembly. Four conservators estimated the earliest completion time. 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
Whose completion time follows the work plan?
- The analytical records answer the analytical question; worksheet records establish the review reconstruction. Candidate proposals and supplementary recollections are claims to test.
- There are 3 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
Gio Cole
Proposed deduction
“The earliest finish is 09:29.”
Hana West
Proposed deduction
“The earliest finish is 09:27.”
Eli Ash
Proposed deduction
“The earliest finish is 09:35.”
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.
LINKED RECORD
Assembly instruction
After both repairs finish, final assembly takes 8 minutes. No task can be shortened or started before its prerequisites.
This adds the final dependent task.
CONTEXT NOTE
Object register
The object is a framed charcoal portrait.
The subject does not alter the task durations.
PRIMARY RECORD
Repair plan
At 09:00, cleaning begins and takes 12 minutes. Only after cleaning, backing repair takes 9 minutes while frame repair takes 15 minutes; those repairs run in parallel.
This defines the dependency and overlapping repairs.
RECONSTRUCTION RECORD
Review register
This is the same investigation’s document review record. There are 3 ordered events, labelled Review 1, Review 2, Review 3. Each listed person and item occurs exactly once. These slots describe record order, not times from the analytical problem.
- The event reviewed by Gio Cole occupies slot 3 (Review 3).
- The event reviewed by Fara Reed occurs immediately before the event reviewed by Eli Ash (consecutive rows, with no event between them).
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 “Object register” occupies slot 2 (Review 2).
- The event involving “Repair plan” occurs earlier than the event reviewed by Gio Cole, without claiming they are consecutive.
Use each column’s choices exactly once. Verified relationships govern the board; proposed answers and later recollections do not override them.
Questions to resolve
Reconstruct the file or item order through the verified register.
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.