  Yes! Upcoming galaxy shear surveys have the potential to significantly
improve our understanding of dark energy and neutrino mass if lensing
systematics can be sufficiently controlled. The cross-correlations between the
weak lensing shear, galaxy number counts from a galaxy redshift survey, and the
CMB lensing convergence can be used to calibrate the shear multiplicative bias,
one of the most challenging systematics in lensing surveys. These
cross-correlations can significantly reduce the deleterious effects of the
uncertainties in multiplicative bias.
