Derivation Web

source_a18d4da4f4bd422a

# Source literature boundary memo

## Research question

Does supply chain show a consistent direction-bearing association in the selected source bundle, and where do null/mixed or context-only receipts bound the claim?

## Selection criteria

The source-literature selector kept supply chain because the candidate bundle met the public source rule: 5 citable papers, 5 distinct fact-backed source id…