A self-contained setup ('Genesis ASSP') sealed off from any outside input.
The engine describes it as a closed system that, by design, can't take in anything new from the outside world.
Because it feeds only on its own output, it drifts into 'model collapse' — the gradual degradation you get when something recycles itself with no fresh input.
A separate analysis (BST) predicts it will fail, because nothing that only copies itself can stay healthy for long.