“Begin!” shouted Vázquez.
Mauricio pressed a button. The robot lit up with flashing lights, futuristic sounds, and a low mechanical hum. It began pumping, but the water flow sputtered unevenly.
“It’s calibrating the sensors!” Mauricio called nervously. “It has to analyze the water’s purity first!”
Álvaro had no buttons. He simply opened the valve connected to the water source and carefully adjusted the air intake.
At first, nothing happened.
A few quiet laughs rose from the front rows.
“It’s garbage,” someone whispered.
Then physics did its work.
As air rushed through the narrowed pipe, it created a vacuum. Water from the lower basin was suddenly sucked upward and shot through the system in a powerful, continuous stream—driven by pure mechanical intelligence without a single watt of electricity.
Álvaro’s tank began filling.
Mauricio’s robot stopped.
A red warning light blinked on its panel.
“Wi-Fi connection error,” Mauricio read from the screen in frustration.
“Why does it need Wi-Fi to pump water?” Vázquez asked into the microphone with sharp irony.
The gymnasium fell silent.
The only sound was the steady splash of water pouring into Álvaro’s tank—rhythmic, constant, triumphant.
“Stop!” Vázquez called out once Álvaro’s tank overflowed.
Mauricio’s tank barely had a puddle.
The silence that followed was thick and heavy.
Rodrigo Estrada jumped to his feet, furious. “This is ridiculous! That boy tampered with something! My son’s robot cost fifty thousand dollars. It can’t lose to a pile of old pipes!”
Rómulo Vázquez stepped forward and lifted the microphone.
“Money can buy technology, Mr. Estrada,” he said calmly. “But it cannot buy ingenuity. It cannot buy the hunger to learn. And it certainly cannot buy physics.”
Then he turned back to Álvaro.
“Son, you said your grandfather taught you this. What’s his name?”
“Nicolás. Nicolás Campos,” Álvaro replied, holding his device tightly.
Suddenly, Vázquez’s eyes filled with tears. The microphone picked up his unsteady breathing.
“Nicolás… young Nicolás. Sixty years ago, when I was a newly graduated engineer working in the countryside, I had an assistant—a farm boy who couldn’t read very well, but who understood water better than anyone. I explained the Venturi principle to him once on a napkin. One day he saved my life when a bomb exploded nearby… but after that I never knew what happened to him.”
Vázquez walked closer and gently placed his hand on Álvaro’s shoulder.
“Your grandfather didn’t just learn. He improved what I showed him. What you’ve done here… this level of efficiency… it’s brilliant.”
Then Vázquez looked toward the back of the gym, where Ramiro stood silently crying behind a column.
“Mr. Campos,” he called. “Ramiro Campos. Please come up to the stage.”
Ramiro shook his head, embarrassed by his janitor uniform and worn shoes. But the audience had already begun applauding—softly at first, then louder and louder.
Álvaro ran to the edge of the stage and reached out his hand.
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