Sentence:  But the oddness of the falsifiability criterion, and the impossibility, on Popper's account, of providing the necessary disposition-free singular descriptive statements which he requires for falsifiability (except at the price of attitudinal relativism) so <WSD>pragmatize</WSD> the notion of demarcation that it is not clear that it is doing any work at all. 
Meaning of the word marked with <WSD> tags:  To consider, represent, or embody (something unreal) as fact; to materialize.