Posterior predictive checks for the low-z CFHTLenS samples. The data points are normalised bias measurements b_2D (left panel) and r_2D (right panel) with jackknife errors as a function of aperture size. The orange regions are the posterior predictive distributions of our templates with 68% and 95% CIs; the dashed lines are the median. The green solid lines depict the normalised bias and 68% confidence intervals for H15 mock data in SH18 without shape noise.