Immersion

It took thirty days to render an immersion matrix for Jack.
Technicians tested it thoroughly for paradoxes and anomalies.
“It’s ready,” they said.
Jack was plugged into the matrix and we calibrated sensors so he wouldn’t realize that he wasn’t in the real world.
Everyone and everything he’d encounter in that matrix would be generated by it. Even Jack would be rendered by that matrix.
“It’s working,” said the technicians. “He doesn’t realize anything.”
For ninety years, we kept Jack running, and he thought he lived a full and happy life.
“We did well,” I said.
And they unplugged me.