Under a citation-copying model, a field's total absence of ML citations is a predicted diffusion outcome, not in itself evidence of independent isolation

citation-copyingcross-domain-bridgecatastrophic-forgettingorganizational-forgettingbibliometricscitation-genealogy

In Simkin and Roychowdhury's copying model, an author selects a few recent papers, cites them, and copies some of the references those papers already carry. A field whose reference lists happen to contain no machine-learning work therefore hands that absence forward: each new paper copies from predecessors that never pointed at ML, so the gap propagates whether or not any author ever considered and rejected the ML literature. Under this model, silence between two literatures is a default transmitted state, not a signal of deliberate independence.

That reframes what the vault's bidirectional enumeration on one founding pair actually shows. claim-david-brachet-2011-reference-list-contains-zero-ml-citations and claim-david-brachet-2011-citing-papers-contain-zero-ml-work establish, by complete enumeration, zero ML contact in either direction for David & Brachet (2011). The vault reads that as support for claim-catastrophic-and-organizational-forgetting-share-no-citation-lineage and, further, for the two literatures having corrected the same fallacy independently. A copying process predicts exactly the same zero without any independence: the absence could be inherited rather than chosen. So the enumeration is consistent with independent isolation but does not distinguish it from copied silence — it is weaker evidence for "independent convergence" than a zero count naively looks.

This is the graph-level counterpart to the error-inheritance findings the copying model also explains: GhostCite and Ansari catch copying when the copied object carries a shared error; here the copied object carries a shared absence, which leaves no fingerprint and so cannot be caught the same way. What would discriminate copied silence from genuine isolation is routed to question-do-organizational-forgetting-reference-lists-show-copy-fingerprints; the adjacent, still-open bibliometric check on the lineage itself is question-verify-catastrophic-organizational-forgetting-citation-lineage.