If we're going to get into semantics/logic, I want a turn!

Quote Originally Posted by EasymodeX View Post
... Or your perspective is skewed. I don't perceive any meaningful difference between "positioning" and "mobility". Mobility is dynamic positioning -- a subset of the concept of positioning.
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If I'm interpreting the structure of your response correctly, then you're suggesting that two concepts do not possess meaningful differences if one of the concepts is a subset of the other.

Just because two concepts are related in some way (share a variable with the same units) doesn't mean their differences are too small to be meaningful. The empty set is a subset of the reals (or any set for that matter), but it would be wrong to infer that because of the aforementioned relation, there isn't a meaningful difference between two.