I WONDER HOW OFTEN STUFF LIKE THIS HAPPENS AND NOBODY NOTICES? The Mixed-Up Brothers of Bogotá: After a hospital error, two pairs of Colombian identical twins were raised as two pairs of fraternal twins. This is the story of how they found one another — and of what happened next.

After six months, Janeth left Strycon for another job, but even then, whenever she and her boyfriend ran into William, she wondered if she should have told Jorge about his double. That question tugged at her until finally, on Sept. 9, 2014, a slow day at her new job, Janeth texted Laura an image of William to show Jorge.

Laura went upstairs to piping to get Jorge’s reaction to the photo. Jorge, smiling, took a look at her phone. He swore. ‘‘That’s me!’’ he said. He stared at the image.

William was wearing a yellow Colombian soccer jersey, practically a national uniform on the day of big matches. Jorge often wore one just like it, which made it all the more apparent just how thoroughly the young man in the photo looked like him. A friend was walking by Jorge’s desk, and Jorge flagged him down for a second opinion.

‘‘Tell me what you think of this photo,’’ he told his friend, handing him the phone.

You look fine, the friend said.

‘‘Except it’s not me,’’ Jorge said. He could not stop staring at Laura’s phone.

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