QED Night
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The Five Platforms: Zara, Keiko, Priya, Luca, and Jonas

Verified— unique solution
zebra
Five platforms stand in a row, numbered 1 to 5 from left to right. Each holds exactly one of each attribute, and no attribute repeats. Work out the full arrangement from these clues: 1. The traveler bound for Geneva is somewhere to the left of the traveler reading a guidebook. 2. The traveler with the suitcase is not the traveler bound for Porto. 3. The traveler with the guitar case is immediately to the left of Priya. 4. The traveler with the backpack is not the traveler reading a guidebook. 5. The traveler bound for Porto is somewhere to the left of the traveler reading a novel. 6. The traveler with the trunk is somewhere to the left of the traveler reading a manual. 7. The traveler bound for Kraków is immediately to the right of Keiko. 8. The traveler with the trunk is immediately to the right of Priya. 9. The traveler bound for Prague is immediately to the left of the traveler with the backpack. 10. Luca is not the traveler bound for Bruges. 11. The traveler with the backpack is not the traveler bound for Bruges. 12. The traveler reading a novel is immediately to the left of the traveler reading a manual. 13. The traveler bound for Bruges is immediately to the left of the traveler with the suitcase. 14. The traveler bound for Geneva is immediately to the left of the traveler reading a newspaper. 15. Jonas is somewhere to the left of the traveler bound for Bruges.

Hints

Hint 1
Hint 2
Hint 3

Solution

Commit an attempt to unseal the proof. Write your answer — right or wrong, thinking it through is the point.

In the final arrangement, which numbered platform (1–5) does “Zara” end up at? Answer with the number.

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