Admissibility frontier · Edition 3

Expanded claim page · assertion 2 of 3

selection is a channel, not a filter

Obstruction / no-goAuditor

A stated candidate class or identification has been ruled out under explicit assumptions. checks assumptions, certificates, counterexamples and stopping rules.

Exact assertion

The exact one-third selector map acts affinely on a density matrix or ensemble covariance. It can be built by indexed acoustic shots: route the returned field with probability one third, inject the independently calibrated Y preparation with probability two thirds, retain the branch labels and reconstruct the covariance. Every traceless covariance perturbation then contracts by exactly one third. Individual coherent shots do not contract; only the ensemble does.

What this commits us to

A specified candidate class fails under explicit assumptions. The conclusion does not automatically extend to mechanisms outside that class.

Logical anatomy

Scope

Chapter “The admissibility frontier”, section “selection is a channel, not a filter”. This is assertion 2 of 3 in that section.

Evidence posture

Check the assumptions defining the ruled-out candidate class; the no-go does not automatically extend beyond that class.

Research move

checks assumptions, certificates, counterexamples and stopping rules.

Verification route

  1. Recover the declared objects and assumptions from the controlling documents.
  2. Check the calculation, construction, obstruction or stopping rule on those same objects.
  3. Compare the source conclusion with the exact assertion above; do not strengthen its verbs or enlarge its domain.
  4. Apply the status rule and retain every named external dependency.

What would move or defeat this claim

Break one of the no-go assumptions in a controlled construction, or show that the alleged obstruction does not follow within its stated class.

Source map

Controlling documents