Concept-vector cosine collapsed over the response tokens and all sentences, per residual layer. Tokens always collapse first; the replicate control then picks what the spread is taken over — concept words (each word's sentences averaged first) or every word × sentence cell at once, the order the paper uses in Figure 26. The bands control picks ±1 std (spread across replicates) or ±1 SEM (uncertainty of the plotted mean).