Corredores with a hint false

1. It begins with Beto's statement: if it is true, it directly establishes a position.
2. Cora's phrase not only compares two runners; forms a consecutive block.
3. Check what happens if Diego's sentence were true. There must be exactly one lie, not one or several.

Answer: They arrived in this order: $$
\t\t\t\t\t\t\t\t\text{Beto},\ \t\t\t\t\t\t\t\t\text{Ana},\ \t\t\t\t\t\t\t\t\text{Diego},\ \t\t\t\t\t\t\t\t\text{Cora}.
$$ We know that exactly one statement is false. Beto's phrase says that Ana came second. Let's assume it's true. So Ana occupies position 2. Cora's sentence says that Diego arrived immediately before her. If Ana is already in position 2, the only possible block for Diego and Cora is: Diego 3rd, Cora 4th. The remaining position, the first, goes to Beto. Thus we obtain: 1. Beto

1. Anna
2. Diego
3. Cora Now we check the four statements: - Ana said: “I wasn't the first.” TRUE.

• Beto said: “Ana came second.” TRUE.
• Cora said: “Diego arrived immediately before me.” TRUE.
• Diego said: “Beto came second.” Fake. There is exactly one false statement, as the statement requires. Therefore, the order is unique: Beto, Ana, Diego, Cora.