Nigel D'Sa

Human spaceflight has been evaluated largely through physiological endurance and operational success. A more fundamental question has gone untested: whether cognition remains viable when the environmental conditions that have always accompanied human life are radically altered. This article argues, from enactive theories of cognition, that human cognition is constituted through ongoing organism-environment coupling. That cognition travels intact beyond Earth—the portability assumption—is therefore an open empirical claim rather than a safe default. Evidence from vestibular disruption, orbital adaptation, and terrestrial analogues indicates that altering this coupling can modify cognition and experience—yet cognition under long-duration alteration of terrestrial conditions has never been instrumented as a distinct question. The gap is structural. A condition that has never varied offers no occasion for its own examination. Spaceflight is the first setting in which the environmental dependence of human cognition becomes empirically investigable. Constitutive claims formulated across a single environment become, once a second is available, hypotheses that discriminate. Mission success cannot itself establish cognitive viability; engineering achievement and the integrity of cognition are distinct. The article proposes a framework built on measures of coherence rather than performance alone, identifying a distinct object of inquiry: what conditions allow cognition to remain viable beyond Earth—an ecology of deep space consciousness, consciousness here understood as the coherent disclosure of a world. Once that object is specified, its omission is no longer methodologically innocent.