Is the conversation of play the world?

In a little post-FKR corner of Discord, the talented Tanya Floaker posed a question based on a post from Aggregate Cognizance : Is the conversation of play the world? In that little community we like to think about "the world" as central to our approach to RPG-ing. The question then is about "what is" or "where is" that world - is it the conversation of play, or something else? I had a gut…