I know what a cup is. Measured from a standard US measuring cup, it is 8 liquid ounces. These are US measurements.
When I pour a cup of coffee in the morning, I use a coffee cup that holds 6 ounces. Like most of us, I have an eclectic mix of coffee mugs in the cupboard, but they all hold about six ounces. There ain't no demitasse cups in my cupboard.
I have a 12 cup coffee maker. I make a full pot every morning. My particular coffee maker is a Proctor-Silex, but I've noticed that all the brands have about the same weird-assed markings on the carafes. Normally, I get about 6 or seven cups of coffee from a 12 cup coffee maker, depending on the mug I use to drink my brew.
I just took the carafe off the coffee maker, filled it to the 8 cup line, then measured the water in the carafe with a measuring cup. My coffee maker, at the 8 cup line, holds just exactly four measured cups of water.
SO, the cup markings my US coffee maker are just exactly half a cup. What sort of dumb-ass marked the cup measures on the pot?
Note to coffee-maker manufacturers: Use standard measures, or mark it at 6 ounces and call it a nine-mug coffee maker.
Not that I expect anything from the manufacturers. I'm sure that the engineers who design these things know that they're lying to us. I'm used to being victimized by engineers, who in my experience are no better than lawyers, and I hold lawyers in complete and utter contempt. We need engineers and lawyers like we need septic systems, but it isn't something that a civilized person wants to be familiar with.