But the word 'concept' refers to something specifically human: it's a name we've given to a category of human mental activity. Particular concepts may /refer/ t

But the word 'concept' refers to something specifically human: it's a name we've given to a category of human mental activity. Particular concepts may /refer/ to things that would be there without humans—but the concept making the reference would not. The whole issue under discussion comes down to that distinction.