analysis: identify hierarchical spatial credit bottleneck

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diff --git a/NOVELTY.md b/NOVELTY.md
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@@ -50,6 +50,15 @@ BurstCCN already:
 Thus neither "apical dendrites carry vector errors", "the model reproduces Harnett Fig. 5", nor
 "a dendritic local rule scales to ImageNet" is a sufficient novelty claim.
 
+Likewise, recursive spatial feedback, learned feedback convolutions, and local
+ReLU-gated error propagation are not new by themselves. The post-failure
+hierarchical oracle deliberately reconstructs a BP-like local adjoint and may
+guide engineering, but it cannot be presented as an SDIL contribution. Any
+trainable version must be compared directly with hierarchical FA, learned
+feedback alignment/weight-mirroring methods, and BurstCCN. The Harnett-specific
+claim remains the neutral-period somato-dendritic innovation operation under
+mixed traffic.
+
 ## Candidate SDIL contribution
 
 The candidate contribution is the combination