feeling sheepish

Turns out "20 oz. pint" is not an oxymoron. My all-knowing friend, Rusty, has informed me that in Ireland, a pint is 20 ounces, an "imperial pint." It's true. You learn something new every day . . .

From wikipedia:

The pint is a unit of volume or capacity. It is used mainly in the U.S., the UK and Ireland, although the value is not the same and the U.S. has two types of pint:

1 Imperial pint (UK) = 20 UK fluid ounces ≈ 568 mL (0.56826125 litres more exactly)
1 Imperial pint (UK) = 4 UK gills (this was the legal definition although in some areas a gill of milk or beer referred to 1/2 pint; elsewhere a gill was the 1/3 pint of milk given free to school children)
1 pint (U.S., wet) = 16 U.S. fluid ounces = 2 U.S. cups ≈ 473 mL (0.473176473 litres exactly)
1 pint (U.S., dry) ≈ 551 mL (0.5506104713575 litres exactly)
As part of the metrication process, the pint in the UK and in Kenya is now only used as a measure for beer (see pint glass) and cider when sold by the glass (in public houses for instance) and milk (although milk is also sold in metric quantities). Many recipes published in the UK still provide ingredient quantities in imperial and metric, where the pint is often used as a unit for larger liquid quantites. Most new recipes are now published in metric only with the pint being rounded to 500 or 600 ml. Ireland has completed its metrication process and the pint is only use for serving beer, stout and cider.