The phenomenon is distinct from ordinary forecasting error. Ordinary forecasting error produces predictions that are off by degrees. Temporal vertigo produces predictions that are categorically wrong — plans rational on their own terms for a world that has ceased to exist. The executives whose 2026 planning was based on pre-December 2025 assumptions were not slow or unintelligent; they were victims of a projection apparatus calibrated to a superseded rate of change.
The mind's linearizing heuristic — projecting recent past into near future at approximately the same pace — is an evolutionary adaptation that served well for the first seven hundred and ninety-nine of Toffler's lifetimes. In the eight-hundredth, it fails catastrophically. The failure is not individual but species-level: no member of the species has evolved to process the rate of change now in operation.
Temporal vertigo has institutional analogs. Regulatory processes operating on multi-year timescales experience vertigo when the technologies they govern advance through capability generations in months. Educational curricula operating on multi-year redesign cycles experience vertigo when labor markets restructure during the redesign. Corporate planning experiences vertigo when assumptions underlying plans change before plans can execute. Aggregated across institutions, vertigo becomes the systemic disorientation that characterizes the current moment.
The concept extends Toffler's original Future Shock diagnosis of disorientation under acceleration to the specific mechanism — projection-apparatus failure — that the AI transition has made diagnostic.
The term echoes medical terminology (vertigo as the loss of spatial orientation) extended to temporal orientation, on the analogy that the mind requires stable temporal framing as much as the body requires stable spatial framing.
Categorically wrong, not incrementally. Unlike ordinary forecasting error, temporal vertigo produces plans rational on obsolete maps and wrong about the world.
Projection apparatus failure. The evolved linearizing heuristic fails when change is exponential rather than approximately linear.
Individual and institutional scales. Vertigo occurs at the level of individual planning and at the level of institutional adaptation; aggregated, it produces civilizational disorientation.
Species-level. No member of the species has evolved to process the current rate of change; the failure is not individual weakness.