Made it to the questions, phew.

Dave Baker: Is Witten saying that this is essentially a notational difference?

Nic: We just don’t know what dynamics is in 3D gravity.  The dynamics of the CFT, which we know more about, allows us to map initial to final states which have their gravitational correspondents.

Eleanor Knox: Puzzled by the maps we have between boundary and bulk.  Why are the co-ords. the same?

Nic: This is highly schematic.  Let me explain how the correspondence works in more detail. …