More Or Less, the BBC statistics/news podcast did a bit on this recently. It was very good. They used the example of people wearing seatbelts. The vast majorit

More Or Less, the BBC statistics/news podcast did a bit on this recently. It was very good. They used the example of people wearing seatbelts. The vast majority of people injured in car accidents were wearing seatbelts. Because the vast vast vast majority of people in car wear seat belts.