The Impossible Delivery
Every parcel arrived. One never could have.
Your role
Evidence is a system. Read it like one.
Calculate shortest routes, handoffs and delivery windows to expose a false scan.
First-case tutorial
What you actually do
- Apply the depot order rule to every delivery.
- Work from verified records, not narrative assumptions.
- Find the single row that cannot occur.
Formal rules
- Pickup ≤ depot scan ≤ delivery.
- All timestamps use one verified clock.
Cases in this family rotate through multiple reasoning archetypes, so higher difficulty changes the deduction structure rather than simply adding more rows.
Route TimeDepot TransferCapacity ChainDelivery Window