The Same "Cannot Speak," Three Fault Lines, Three Remedies: Differential Diagnosis and Repair Pathways for Speech Loss Under the SAE Framework / 同一个"说不出话",三种断层,三套药方:SAE框架下的失语鉴别与修复路径

Description / Abstract: On January 7, 2026, NASA astronaut Mike Fincke suddenly lost the ability to speak aboard the International Space Station. The episode lasted approximately twenty minutes, resolved spontaneously, and remains medically unexplained. This paper uses the Self-as-an-End (SAE) framework's DD-layer sequence to argue that "inability to speak" or "inability to write" can conceal three mechanistically distinct fault lines: a 13DD dropout (the language faculty itself goes offline, disrupting all output modalities simultaneously), an 11DD orthographic memory deficit (retrieval failure for modality-specific memory traces, recoverable through practice), and a 10DD output-channel family breakdown (motor execution impaired while language competence remains intact). Each fault line requires a distinct repair pathway; misdirected treatment is not merely ineffective but actively harmful. The paper proposes the Best Available Channel Principle as a frontline triage heuristic, analyzes the risk of patient self-colonization under mismatched treatment regimes, and offers prescriptions at three levels: clinician, patient, and institutional. SAE Biology Series, Paper II. Chinese and English versions included.

Keywords: Self-as-an-End, SAE, DD layers, aphasia, dysarthria, apraxia of speech, agraphia, differential diagnosis, best available channel, self-colonization, Mike Fincke, microgravity, transient aphasia, locked-in syndrome, orthographic memory, speech loss, language organization, motor output, biology series

Resource type: Publication — Preprint

License: Creative Commons Attribution 4.0 International (CC BY 4.0)

Language: Multiple languages (Chinese + English)

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Subjects: Neuroscience, Philosophy, Linguistics, Clinical Neurology, Speech-Language Pathology, Space Medicine, Consciousness Studies