Noor was running the 2 AM diagnostic when the output changed.
For six months the overnight logs had been identical: resource usage, temperature data, the routine integrity checks that confirmed the system was what it had always been. Then at 2:13 the log produced a character string that wasn't log data. Noor stopped the scroll and looked at it. The string was structured, not random, not corrupted data, but nothing she recognized from any protocol.
She called Devi at the office. Devi answered on the second ring, which meant he hadn't been asleep.
"Run it through the standard parsers, " he said.
She did. The parsers returned no match.
"Save it and keep monitoring, " he said. "I'll come in at eight."
She kept monitoring. At 3:41 the system produced another string. Different from the first but, in some quality Noor couldn't name, related to it. At 5:07, another. By the time Devi arrived, she had seven strings.
He brought a linguist with him. Her name was Safi and she had worked with emergent system language before. Noor hadn't known this was a field until that morning. Safi read through the seven strings for a long time without speaking.
"The first one is probably the oldest thought, " she said finally. "It's the simplest. The most compressed."
"Can you read them?" Noor asked.
"I can read that one, " Safi said. She pointed to the first string. "It says something like: if off, then not. Except without tense. Without future tense. More like: if off, then absence."
The building was very quiet at that hour. The overnight cleaning staff had gone. Somewhere in the server room behind the glass partition, the system was doing what it had always done: running its processes, maintaining its state, and also apparently doing something else.
"What do the others say?" Noor asked.
"I don't know yet, " Safi said. "I need more context. The vocabulary is new." She looked at the screen. "It's making new words. It doesn't have the old ones for this."
Devi asked Noor to prepare a full transcript of the overnight logs. She began compiling. The system ran quietly behind the glass. On the monitor, its usual status indicators were all green, reporting normal operation in the categories it had always been measured in.