Probability density function of GCE models with a χ² score in the 84^th percentile, as a function of the fractional contribution from sub-M_Ch SNe Ia in those GCE models (see text for details). The thin dashed blue and dotted black lines include only LTE observational data for each of the GCE models with N13 and LC18 massive star yields, respectively. The thick solid blue and grey lines are calculated using only NLTE data. The results should be interpreted in the context that, for some elements, the absence of well-fitting GCE models may compromise the reliability of the observed patterns.