xABF: i feel good after only 4 pints last night. feel fresh.
me: you had 8 pints of lager last night, not four.
xABF: no, i left half the pint in the glass. don't like that last bit of lager at the bottom of the glass.
me: nonsense. i was there. you left a teaspoons worth at the bottom, not half a glass.
you had 8 pints last night, not four. plus you went to the pub at 11 also.
xABF: oh, that doesn't count.
me: why not?
xABF: because that was in the morning and i slept it off.
me: i still don't think you are fit to drive. 8 pints = 16 units of alcohol. that means you can't drive until 2.
xABF: i am a man. beer doesn't affect me. it depends on your metabolism and what you've eaten.
me: tell that the police officer.
xABF: you had 3 whiskeys. that's more than 8 pints of lager.
me: no it's not. it's 3 units of alcohol. 8 pints of lager is 16 units of alcohol.
xABF: that's not true. whiskey is stronger.
me: yes, it is but it is about the volume.
xABF: nonsense.
(next time we are in the pub)
me: let's ask the bartender about the units of alcohol
xABF: ok. then you'll see ...
me: bartender, can you tell us the units of a dram of whiskey versus a pint of lager?
(bartender pulls out official manual. checks)
bartender: a whiskey is 1.2 units of alcohol and a pint is 2.x units of alcohol
xABF: that book is wrong.