Summary of the MC to show the effect of using wrong centers to compute the stellar mass surface density radial profile of a galaxy. Inferred inner slope versus artificial offset (in kpc). The true inner slope is zero, as is the slope inferred from the fits when the offset goes to zero. The different colors represent different number of stars used to construct the mock galaxies (see the inset for the actual values). Those with errors closest to Nube are represented with blue symbols. Nube is inconsistent with them.