Inference variations due to the birth environment velocity dispersion. Posteriors on the natal kick v_k and mass loss Δm₂, when the birth environment has velocity dispersion in all three directions equal to 1, 3, or 10 km s⁻¹ (red, blue, and yellow lines, respectively). The model shown here is for the initially circular mock system with the circular prior, in the best-case scenario SOV₃. Black dashed lines show the true values.