Very clever --things have come quite a ways since Mavis Beacon. I see the WPM in this, but what about accuracy? Should you be able to recover the word when you

Very clever --things have come quite a ways since Mavis Beacon. I see the WPM in this, but what about accuracy? Should you be able to recover the word when you mistype it? In any case, a fine example of game-reward theory tying into feedback loops for education.