nx_source_grade.nx

nx_source_grade.nx -- the SOURCE-CRITICISM organ: qualitative + quantitative accuracy grading of the sources an analysis stands on. Operator: "clarity on what we see in real terms, measuring qualitatively and quantitatively the accuracy based on first-party sources, their biases, their actual research method." Built from CORROBORATED tradecraft research (knowledge/library/analyst-tradecraft-best-practices-2026-06-10.txt): - NATO/Admiralty 6x6 (C2): source RELIABILITY A..F and information CREDIBILITY 1..6 are rated INDEPENDENTLY, then composed. F and 6 are honest "cannot judge" states -- they are NEVER actionable and owe a fetch-task (like the Analyst's narrative nodes). - First-party DISTANCE + METHOD rung (C6): primary>secondary>tertiary; measured-record > systematic-aggregation > survey > expert-estimate > marketing-claim. - INDEPENDENCE RULE (C5, the sharpest upgrade): two sources in the SAME incentive class are ECHOES of one interest, not corroboration. A claim is corroborated only across >=2 DISTINCT bias classes; agreement between OPPOSED incentive classes is the strongest signal. - ICD 203 (C1,C3): CONFIDENCE (how sure: 1=LOW 2=MODERATE 3=HIGH, driven by source quality + independence) is a SEPARATE dimension from LIKELIHOOD (7 estimative bands); the two must never be combined in one sentence -- sg_separation_ok encodes the law for report emitters. Quantitative score = permil composition of the four axes; qualitative grade = the (letter, digit) Admiralty pair, kept alongside, never replaced by the number. LAWS: struct-free, integer-only (permil), no &&/||. license_tier: ORIGINAL