The Alibi Market
Forty-seven receipts. One was never printed.
Your role
Evidence is a system. Read it like one.
Use registers, stock events, change and walking time to detect the fabricated alibi.
First-case tutorial
What you actually do
- Treat the briefing as context only. Every elimination must still be proven by a formal record.
- Compare sale time with stock-out time.
- Equal times are allowed.
- Find the sale after stock-out.
Formal rules
- Stock records are exact.
- No replenishment occurred.
Cases in this family rotate through multiple reasoning archetypes, so higher difficulty changes the deduction structure rather than simply adding more rows.
Receipt OrderStock WindowChange ErrorTravel Gap