Evaluates a switch rule's efficacy in channel selection, suggesting potential optimization in system performance.
CDN-195 freezes the operator-only switch rule left open by CDN-194. The rule has no fitted threshold: choose the phase-gradient channel exactly when the driven response peak crosses the phase-gradient prediction; otherwise choose the source channel. With the inherited source selector, the switched rule hits all three existing floor anchors with maximum error 0.002976; with rounded sigma*k = 2/3, it still hits all three with maximum error 0.003024. This freezes a candidate switch, but it remains in-family rather than a new holdout, so D9 is not yet closed.
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Nicky Joseph Hubertus Catharina Hacquier (2026) studied this question.
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