In "blackboard" the NL word maps to either "a board that is black in color"
or "a board for writing that is usually black/green/white". The KR of those
concepts are unambiguous; it's just that there are 2 alternatives.
This is very naive... a concept such as "a board that is black in
color" is not unambiguous at all ...
-- what % of the board needs to be black ?
-- what kind of object really qualifies as a board?
-- how dark does something have to be, to be black?
etc.
the answers to these questions depend on context, so whether an object
is classified as "a board that is black in color" depends on
context... quite independently of any linguistic ambiguities
associated...
ben
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