The Detective’s DeskHana Reed
Organiser
What happened from your point of view?
Today’s staff passes have a triangle day code.
What should I check to test that account?
Our old square-code souvenirs also carry the festival logo.
EASY · CASE FILE
The Wrong Stamp on the Pass
Easy · A small music festival
Someone presents a staff pass carrying the right logo. Ask where it came from and compare the day code.
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.
The scene
No visitor has entered backstage yet. Staff can examine the pass without needing any outside rules.
People and accounts
Jules Bell
Visitor
What happened from your point of view?
The organiser issued me a valid pass for today.
What should I check to test that account?
I bought it at a resale stall.
Evan Cole
Stallholder
What happened from your point of view?
I sold Jules a square souvenir and described it as backstage access.
What should I check to test that account?
I had today’s pass notice beside the till.
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.
Case record · Staff desk
Today’s issue notice
Only triangle-code passes grant today’s access. Square-code souvenirs explicitly grant none.
Case record · Resale stall
Stall receipt
Evan’s signed receipt describes the square souvenir as “today backstage entry”.
Case record · Resale stall
Stall notice acknowledgment
Before the sale Evan signs receipt of today’s triangle-code rule and square-souvenir restriction.
Case record · Gate
Presented pass
Jules’s pass carries a square day code and the genuine festival logo.
Questions to resolve
Who knowingly sold a souvenir as current access?
Is Jules’s presented pass valid under the supplied rule?
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.