  We discuss how disk models may limit the scope of identifying astrophysical
black holes. We show that the standard Keplerian thin disk model, the thick
disk model, slim disks, ADAFs etc. are fundamentally limited. We present the
most complete solution to date called the advective accretion disk and discuss
how it has the scope to address every observational aspects of a black hole.
Though the magnetic field is not fully self-consistently taken care of yet, the
details with which the present model can handle various issues successfully are
astounding. We present some of the examples.
