The standard cosmological
lore is that galaxy surveys and cosmic microwave background (CMB)
experiments open up a window on fundamental physics such as dark energy
and dark matter. The four distinct probes enabled by surveys -- Baryon
Acoustic
Oscillations, Clusters, Gravitational Lensing, and Supernovae --
together with a pristine view of the early universe via the CMB allow us
to determine cosmological parameters such as the equation of state of
dark energy. I argue that this paradigm is breaking
down, as we come to realize that the four probes are all correlated
with one another and with the CMB itself. How to proceed is the subject
of a raging debate, with many possible routes and assumptions. I give a
few examples and recent results from the Dark
Energy Survey and the South Pole Telescope