  This is one of a pair of papers that give a
historical-\emph{cum}-philosophical analysis of the endeavour to understand
black hole entropy as a statistical mechanical entropy obtained by counting
string-theoretic microstates. Both papers focus on Andrew Strominger and Cumrun
Vafa's ground-breaking 1996 calculation, which analysed the black hole in terms
of D-branes. The first paper gives a conceptual analysis of the Strominger-Vafa
argument, and of several research efforts that it engendered. In this paper, we
assess whether the black hole should be considered as emergent from the D-brane
system, particularly in light of the role that duality plays in the argument.
We further identify uses of the quantum-to-classical correspondence principle
in string theory discussions of black holes, and compare these to the
heuristics of earlier efforts in theory construction, in particular those of
the old quantum theory.
