Abstract This case study examines a failed attempt at post-hoc cognitive recovery following an initial user-interface (UI) failure during an exploratory, non-Cognitive-Memoisation (non-CM) session. The session began as a routine attempt to obtain quick exploratory information about claims regarding antiparasitic medications and cancer. A UI failure on a mobile work plane (iPhone) prevented reliable access to agent-generated artifacts, disrupting the normal feedback and verification loop. Cognitive Memoisation (CM) was subsequently introduced post-hoc as a recovery mechanism to reconstruct the session’s reasoning and preserve its epistemic content. Despite explicit assertions of CM normativity, best-effort requirements, and full temporal scope, the recovery process failed. The model repeatedly treated full-temporal scope as descriptive metadata rather than as an enforced retrieval constraint, leading to partial reconstructions, corrective recursion, and eventual logical entanglement. Compounding this failure, constraint pressure reduced the available recovery space, culminating in a terminal, irrecoverable session state. The case demonstrates that under the current framing, CM cannot be relied upon for robust post-hoc recovery once session boundaries have collapsed. It highlights the necessity of enforced default temporal scope, explicit transport provenance, and recovery-aware reasoning strategies for CM to function reliably as a post-failure mechanism.