The Detective’s DeskKian Bell
Proposed deduction
“Start at 10:30.”
MEDIUM · CASE FILE
The free interview room
Medium · PAPER STREET ARCHIVE
A detective needs one uninterrupted interview slot. Four assistants propose start times. 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 proposed slot is available in full?
- 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
Lena Oak
Proposed deduction
“Start at 11:10.”
Ida Moss
Proposed deduction
“Start at 10:22.”
Jory Lake
Proposed deduction
“Start at 10:15.”
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.
CONTEXT NOTE
Room inventory
There are two chairs and one small table.
The furnishings do not change availability.
PRIMARY RECORD
Room booking page
The room is occupied from 10:00 until 10:20 and from 10:45 until 11:10. A booking ending at a boundary does not occupy time after that boundary.
This establishes both unavailable intervals.
LINKED RECORD
Interview request
The interview lasts exactly 20 minutes. It must start no earlier than 10:15 and finish no later than 11:00.
This gives duration and the allowable overall window.
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 Lena Oak occupies slot 1 (Review 1).
- The event involving “Interview request” occurs earlier than the event reviewed by Kian Bell, 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.
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 “Room booking page” 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.
Questions to resolve
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.