Distribution of GRBs in the T₉₀–MVT parameter space. Gray circles denote GRBs whose machine-learning classification is consistent with the traditional duration-based classification. Colored squares mark anomalous bursts for which the machine-learning classification disagrees with the conventional T₉₀ criterion. Orange squares represent Type 1 anomalous GRBs (bursts belonging to Type 1 in the t-SNE embedding but with T₉₀ > 2 s), while blue squares indicate Type 2 anomalous GRBs (bursts belonging to Type 2 in the t-SNE embedding but with T₉₀ < 2 s). The dashed vertical line marks the conventional duration boundary between short and long GRBs at T₉₀ = 2 s.