Two-component recovery for a representative case with Δϕ = 59.5 rad m⁻² (ϕ₁ = +15, ϕ₂ = −44.5 rad m⁻²). Left: simulated Q and U spectra (gray points) with posterior-predictive draws (blue); the characteristic beat pattern of two interfering Faraday screens is clearly visible. Right: joint-posterior corner plot for all six parameters; contours enclose 68% and 95% of the posterior mass, and red dashed lines mark the injected truth. Both rotation measures and polarization amplitudes are recovered without significant bias.