Quote Originally Posted by arrogcow View Post
... And technically pounds and grams are not interchangeable.
Sure they are. I hand over a X pounds (₤) and in return I get Y gram/meters of tartan. The interchange was between me and the weaver and we both of us are happy. QED.

If the US had done it right we'd have gone cold-turky metric like Canada did. But no, we put up two versions of speed limit signs etc and called that good. Where did that get us?