I'm not talking currency, but words. There are a great number of words in the English language with just a modicum of clarity to their meaning. Quite a few are seldom specific. And when I say a few, I'm guessing just a bit. How many is a few? Let me take a moment to ponder.
I can say, with relative certainty, that a few is more than a couple. Couple can be defined as two. That is clear. And while a few is vaguely more than a couple, it is, to a degree, less than some. Which is a far cry from a bunch. Of course, there are a whole host of other words whose meanings could be debated for some time.
One of my favorites is 'moment'. Just how long is a moment? I will wait, for a time, while you think about it.
I like to use words like these when making promises. I once worked for a wretched woman, about whom I can say, she never broke a promise. She never made a promise, so she certainly never broke one.
In my job as an airline pilot, I'm often expected to speak to the traveling public, be it a routine welcome aboard over the PA, or an update on a delay. Vagaries are my lifelines. If we are experiencing an extended delay, I can say, "we expect to depart in a moment," and I will never be wrong.
That's why I like these unknowns. No one can ever accuse you of dishonesty, if they can't define what you say.