Timsup2nothin
Deity
- Joined
- Apr 2, 2013
- Messages
- 46,737
I often wonder about this too, although usually not in the context of units, more in the general sense of what it means to say "I know this". The best answer I can come up with is that most things you learn about have multiple different aspects to them so it isn't really a matter of "I know this" or "I don't know this". Its more a matter of "How well do I know this" which is a function of if you know about all the different aspects of whatever it is.
In the case of units, I assume a basic understanding would be the name of the unit, what it measures (volume, mass, etc.), and it's relation to other common units you already know about. For a deeper understanding you could go into the historical origins, intuition (is this about 10 pounds or 20 pounds?), official standards, etc.
We need someone to set a standard for purposes of this thread then.
I would, but I can't think of an appropriate unit for the measurement.