What a strange use of logic.old.Whoodoo said:was a famous ad in the 70s for anti drink driving, but it also meant 90% are caused by sober drivers, so you are better off being pissed.10% of all road accidents are caused by drink driving!
10% of road accidents being caused by drink driving means that 10% wouldn't have happened if the driver hadn't drunk. This means that these accidents caused wouldn't have been caused by a sober driver.
If it had said "10% of all road accidents are caused by drink drivers!" you'd be correct in saying that 90% are caused by sober drivers. You wouldn't have a point in saying that you're better of pissed though, as you'd have to know the percentage of drunk drivers. Most likely this will be less than 10, meaning that you're better of sober.