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With long-memory ARFIMA(1,d,0) noise instead (fitted d from 0.14 to 0.38), the nominal 5% changepoint test rejects 10.7% to 17.0% of null records, yet the observed statistics keep full-pipeline p-values from 0.003 to 0.040, below 0.01 in four of five records, while the quadratic test's full-pipeline p-values rise to 0.065 to 0.19 (monthly) and 0.025 to 0.12 (annual). · sciencejournal.ai