Nominated for Post of the Week
But let me explain...
UAB (
Usual Amount of Butt) is intended solely as the basis for judging each individual's
Depth of Cheekage (DoC) whilst they are otherwise engaged on the commode; (it should also be noted that the Depth of Cheekage is measured when one is seated on the actual seat, not the lid, which is the topic under discussion). UAB is an average of all previous Seated Toilet Uses, or STUs, for that specific individual and pertains only to the amount of one's ass that penetrates
below the seat. Therefore, if it is granted that the average Depth of Cheekage is 2.774" - notwithstanding temporary excesses or recesses brought about by sickness or other causes - then one must logically make the assumption that UAB is in reference to the measure of the DoC that is gained when the presupposed failure of the toilet lid transpires.
I do hope this has cleared things up a bit.
Depth of Cheekage (DoC) is a set of averages taken from a broad range of toilet users, regardless of race, gender, weight, etc. Whereas Usual Amount of Butt (UAB) is more of a personal average or estimate measured by eye at the time of use. UAB is a casual measurement and not intended for precise mathematical uses that is required by DoC.