I think they point is most people will drink more than one beer an hour. Lets double it and say 2 an hour to see a trend. 2 beers * 1.4 units = 2.8 2 beers * 1

I think they point is most people will drink more than one beer an hour. Lets double it and say 2 an hour to see a trend. 2 beers * 1.4 units = 2.8 2 beers * 1.8 units = 3.6 Subtract 1 from each and you get 1.8 and 2.6 which is roughly 44% more residual alcohol in your system. Lets try 3 beers: 31.4 = 4.2 31.8 = 5.4 residuals: 3.2, 4.4 Which are 37.5% away. Still much more than 25%. So I guess if you are drinking 4 beer per hour his argument breaks down. But I'd also think that a multi hour 4+ beers per hour bender isn't going to last long on 5% beer.