Conditional posteriors for cosτ₁ for the Isotropic + correlated Beta model, when cosτ is correlated with the mass ratio. Colored bands show the 90% CI posterior for cosτ₁ conditional on a fixed value of the mass ratio; yellow dashed lines enclose the 90% CI obtained sampling the correlated parameter from its inferred astrophysical distribution; and black dashed lines enclose the 90% CI of the Isotropic + Beta model, which does not allow for correlations. The increased support at +1 as q decreases is mostly prior-driven.