The scene
Inventions Fair · Voting boothA demonstration received an extra vote after the deadline. A camera shows someone using their personal card to open the ballot box; the card fell behind it as they pulled it out.
The recovered card is stained and its name cannot be read. Each pass at this fair has a differently shaped notch. The allocation records let you compare it without cleaning the ink.
What we know for certain
One of these people inserted the vote and left their own card. There were no loans, extra cards or changes to edges. All cards are rigid. The observed mark is part of the original edge, not a break.
The three accounts
Pere Vidal
Exhibitor«My card has a curved notch.»
Rocío Mas
Presenter«Mine has a point cut inward.»
Saül Grau
Assistant«My edge is cut at right angles.»
Examine the evidence
0 of 5 openedOpening these five clues does not cost points.
01The recovered card
Its notch is a semicircle: one continuous curved arc with no corners. The rest of the edge is intact.
02Pere’s record
His pass has a semicircular notch. The allocation photograph shows the entire arc.
03Rocío’s record
Her pass has a triangular notch, with two straight sides meeting at a point.
04Saül’s record
His pass has a rectangular notch: three straight sections and two inside corners.
05The recorded fall
Only one card fell, and the floor was empty beforehand. It was recovered immediately; nobody could replace it after it fell.