The Detective’s DeskEmre Dale
Model assistant
“Its perimeter is ten centimetres.”
EASY · CASE FILE
Around the window
Easy · ROWAN MODEL SHOP
A model maker is checking a rectangular window panel. The cutting diagram gives its dimensions and the two formulas needed. Three assistants report a measurement from that same diagram.
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
Inspect, test and record the finding. What does the verified record establish?
- The source records are verified and their stated conditions apply to every account.
- Find the account contradicted by a record. A contradiction alone does not establish wrongdoing.
People and accounts
Freya Reed
Model assistant
“Its area is six square centimetres.”
Demi Lake
Model assistant
“The panel’s area is nine square centimetres.”
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.
CUTTING DIAGRAM
A two-by-three rectangle
The rectangle is 2 cm wide and 3 cm high. Area = width × height. Perimeter = 2 × (width + height). Ignore borders and cut losses.
This is a verified source record for this case. Compare its stated facts with the exact question.
PHOTOGRAPH
The paint sample
The maker planned to paint the frame yellow after cutting.
The maker planned to paint the frame yellow after cutting.
DESK RECORD
The shop receipt
The receipt lists the purchase of one sheet without any dimensions.
The receipt lists the purchase of one sheet without any dimensions.
Questions to resolve
Audit all three statements against the verified record.
- Emre Dale — “Its perimeter is ten centimetres.”
- Freya Reed — “Its area is six square centimetres.”
- Demi Lake — “The panel’s area is nine square centimetres.”
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.