When the robotic system was installed, the vendor’s engineer had set a default administrator password: . "We'll change it during the final commissioning," the engineer had promised. But the commissioning was rushed, the paperwork got lost, and Carl, now the only one who remembered, was too busy fighting daily fires to fix it.

A login screen appeared:

Its only flaw was a secret shared by the lead technician, an overworked man named Carl.

Access Granted.

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