Isolate causal contributions of keys and values

Establish the separate causal contributions of key and value representations to the behavioral effects of K/V-cache interventions by conducting K-only and V-only ablation experiments.

Background

The reported K/V cosine analysis finds substantially larger V-space gaps than K-space gaps, but these measurements are correlational and arise from interventions that modify keys and values together. The paper therefore cannot determine whether values, keys, or their interaction causes the observed persona-expression and lexical-diversity effects.

The authors explicitly identify K-only and V-only ablations as the experiments needed to convert the descriptive V-versus-K comparison into a causal characterization.