Final fate distribution in the (μ₄M₄, μ₄) plane over the entire set of S21, S23, S24, T24, and H16 SN progenitors (left panel) and over a subset of progenitors that fall into the “overlap region” with degenerate final fate outcomes, given that that their ξ_2.5, s_c, and M_CO values are neither above nor below the upper or lower threshold value, respectively, for assignment of a final fate forecast based on these variables alone (right panel). Stars from this “overlap region” explode if μ₄M₄ is below the lower threshold. They fail to explode if μ₄M₄ is greater than the upper threshold. For μ₄M₄ values in between, a separation line (in blue) discriminates the CCSN outcomes. The background color classifies the explodability based on this scheme, separating the failed SN (brown) from the successful SN (yellow) regions.