That makes sense, and explains the boil-over problem.
Still, in the real world, one cup = eight ounces, and I'm not going to relearn that as "one cup = six ounces" for one crazy appliance. Seems to me they shouldn't use "cup" to mean something that is not a "cup" in a field where "cup" already has a strict definition.
I have a hard enough time as it is to remember all of the ratios for liquid to different types of grain (white rice, brown rice, couscous, barley, quinoa, etc.)!! One of these days I'm going to write it all on an index card and tape it to an inside cabinet door, instead of having to look it up almost every time.
So, as I said, I've learned what the maximum amounts are for the Cuisinart rice cooker, using REAL measurements, and I can live with that. Thanks for pointing out the reason for the boil-over, though; I hadn't thought of that.