Estimation of δ versus the V-band attenuation for a set of synthetic galaxies with fixed δ = −0.5 (dashed black horizontal line) and a variable attenuation. Each value of the true reddening is plotted in a different color. The shaded areas represent the 1-, 2-, and 3-σ dispersion on δ, with the solid line indicating the median. The effect of the degeneracy is clearly visible for galaxies of the same true reddening. However, considering a range of attenuations, its effect is little different from a dispersion on δ with only a weak trend towards lower δ at low A_V. In addition, very few objects have an extremely steep δ, making it unlikely that they are generated due to degeneracies that would smear the results for a single attenuation curve.