Records the wrong=0 refinement reached in discussion: wrong=0 is not a binary
answer/refuse gate but 'no false presentation of epistemic status'. Practice/
contemplation may explore typed, isolated candidate guesses; served output needs
a servability blade with more modes than verified|refuse. Proposes
ProblemAttemptSession (PRA) and ServabilityDecision (SRV), sequenced PRA -> REL ->
SRV, and traces the idea to the R1/R2/R3/CMB reader trajectory. Session doc, not
an ADR yet.
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