“If you still want to track down the point where bad IT became a crisis, then you have to look past the tech altogether. The Post Office declared, as fiat, that Horizon worked. From there, everything that happened after was the logical conclusion. If Horizon works, then the errors must be because of what the subpostmasters did. If they say they made no errors, then they must have committed fraud. If they committed fraud, then a conviction is morally just.
But Horizon didn’t work”