In the context of prediction, there is no such thing as a “mistake”, any more than a d20 die can make a mistake. You might get a 1 when you wanted a 20, but you

In the context of prediction, there is no such thing as a “mistake”, any more than a d20 die can make a mistake. You might get a 1 when you wanted a 20, but you can hardly blame the machine, only the manufacturer who forgot to weight it with the appropriate (or inappropriate) bias!