Comparison of true parameter distributions and predictions for real observed single absorption lines. Upper panels: the histograms show the distribution of b and log N_HI for a single absorption line common in all three studies estimated by the CNN model in this work (green) overplotted with distributions from D16 (purple) and VIPER (red). The distributions of the CNN predictions for the corresponding mocks are shown in dashed lines.Lower panels: the prediction of single line parameters from CNN compared to the true values from D16 and VIPER.