Hmm, good for usage you say. Ok, let's stick to "standard" imperial units. How many feet in a yard? Yards in a mile? What the hell is a quart? And since base 12 is great, what is 12 feet called? 144 feet? A 12th of an inch?
Or, ounces: How many ounces in a gallon? A pound? And how many _kinds_ of ounces are there, anyways?
Or, ounces: How many ounces in a gallon? A pound? And how many _kinds_ of ounces are there, anyways?
Fun fact: The term “ounce” is of Latin origin from the word “uncia” which means “a twelfth part.” http://www.differencebetween.net/science/mathematics-statist... So...what's an ounce a twelfth of?
Or, say, a pint. What's the definition of a pint?