80 minutes - 8 candidates - 1 answer - no question
Why it is hard sci-fi
Eight candidates for a single corporate job sit a final exam in a sealed room. They are given a blank sheet, three rules, and eighty minutes. The film never leaves the room. The science is light but the rigor is in the puzzle. The candidates have to figure out what the question is by interrogating the rules and the environment, which is closer to an experimental epistemology problem than a thriller.
Science inside it
Constraint satisfaction and information hygiene under time pressure. The film also includes a near-future epidemic backstory that gives the corporate role its weight, but the science of the disease is kept off camera so the puzzle stays clean.
Spoiler alert
The blank sheet is the question. The rule about not leaving the room is the trap. The remaining candidate wins by recognising that the only person needed to answer the question is the candidate herself, and that the corporation has been testing for the willingness to think rather than the answer.