) exp(-t τ 1 ⁄ ) and hence, the amplitudes Δ 1 2 and Δ 2 2 are linearly dependent and therefore indistinguishable. As shown in many examples of Video S3 (e.g. trial 5, iteration 26) and Video S5 (e.g. trial 3, iteration 111) the VIFs and condition number always explode to infinity when pairs align. In every case, the program detects the blow up and reacts by random restart.