When two or more concerns could each explain the same symptom, we open a diagnosticity matrix and evaluate evidence row-by-row across the competing concerns. Evidence consistent with all concerns has zero diagnostic value; evidence that contradicts only one is decisive. We rank by inconsistency — the concern with the most contradicting evidence is rejected first. Linchpin evidence (single-point-of-failure for the leading hypothesis) is flagged explicitly.
No diagnosticity matrices recorded.