In her last public interview, she said: “I built a mirror and told people it was a door. Some of them walked through and never came back. The tragedy isn’t that AlterLife isn’t real. The tragedy is that it’s real enough to lose yourself in.”

And for one long, impossible moment, no one could tell which world was the echo.

They stood in a perfect simulation of that cemetery, under a perfect simulation of rain, watching a perfect simulation of a coffin lower into synthetic earth. Some of them wept. Some of them held hands with loved ones who had been dead for decades. Some of them had been dead themselves for years.