The oscillation is traceable in any extended AI-assisted work session. Segal's account of developing Napster Station moves through all four modes within minutes: he tells Claude what to build (alterity), integrates the output into the project (embodiment), examines a surprising passage (hermeneutics), enters absorbed flow (background). The shifts happen to him, not through deliberate transitions but as involuntary responses to the encounter's changing character.
The structure has consequences. Cognitively: each mode demands a different kind of attention — forward-directed, evaluative, dialogical, or none — and the oscillation produces continuous within-task attentional switching that has no established empirical literature to measure its costs. Affectively: the oscillation produces Segal's 'productive vertigo' — the compound of exhilaration and anxiety, creative power and existential uncertainty, that he struggles throughout You On AI to name. Epistemologically: each mode produces a different kind of knowledge (know-how, know-that, know-with, environmental conditions), and the oscillation means these different knowledges intermingle in ways that make the output extraordinarily broad and extraordinarily difficult to assess for reliability.
The oscillation creates structural tensions between modes. Embodiment and hermeneutics are not simultaneously sustainable — transparency and opacity are incompatible. Alterity and hermeneutics are antagonistic — the affective openness of being met suppresses the critical distance accurate reading requires. Background and any other mode are mutually exclusive — if the tool is in awareness, it is not in the background. The oscillation forces the builder to traverse these incompatibilities repeatedly, and the traversal is where the specific cognitive and affective signature of AI work emerges.
Ihde's multistability concept operates across encounters. The oscillation extends multistability into within-encounter variation, producing a temporal structure the original framework did not anticipate. Whether this constitutes a genuine fifth relation or an unusual pattern of movement among the original four is the central theoretical question the Ihde volume raises but does not finally resolve.
The concept is developed in the Ihde volume by reading You On AI through the postphenomenological framework and finding that the phenomenological testimony consistently exceeds any single category. The argument is that Ihde's existing apparatus — four relations, multistability, amplification-reduction — is necessary but insufficient; a fifth structure is needed to describe the oscillation that AI produces.
Unsettling as feature. AI's refusal to stabilize is constitutive, not accidental.
Within-session multistability. Variation across the four modes occurs within single encounters, not only across different users and contexts.
Involuntary shifts. Mode changes are triggered by the technology's outputs and the work's demands, not by deliberate user choice.
Antagonistic mode pairs. Several mode combinations (alterity/hermeneutics, embodiment/hermeneutics, background/anything) cannot be sustained simultaneously.
Vertigo as diagnostic. Segal's productive vertigo is the phenomenological signature of the oscillation itself, not of any single mode.