Dark matter is inferred rather than directly observed. This article treats the inference as an epistemic pipeline that maps measurements to parameters under canonical physics. The case for dark matter comes from attempting closure of observed phenomena in the measure of gravity and mass. In that practice, closure is often achieved by injecting mass, aka dark matter, to achieve closure. In our case, we posit a closure of the observed phenomena using various aspects of time as the closure. The central claim is that many “missing mass” residuals are consistent with unclosed time structure in the modeling and calibration layers. In canonical general relativity, the operational mapping between coordinate labels and measured durations is represented, in a 3 + 1 split, by separate lapse, shift, and spatial-geometry fields. Each field induces a distinct closure requirement between data, kinematics, and stress–energy bookkeeping. If any closure is imposed implicitly, the residual is often absorbed into an effective gravitating component. We therefore restate common dark-matter arguments as time-domain closure tests within general relativity and Standard-Model matter, emphasizing falsifiers that move the burden onto explicit clocks and constraint-consistent dynamics.

Dark matter is inferred rather than directly observed. This article treats the inference as an epistemic pipeline that maps measurements to parameters under canonical physics. The case for dark matter comes from attempting closure of observed phenomena in the measure of gravity and mass. In that practice, closure is often achieved by injecting mass, aka dark matter, to achieve closure. In our case, we posit a closure of the observed phenomena using various aspects of time as the closure. The central claim is that many “missing mass” residuals are consistent with unclosed time structure in the modeling and calibration layers. In canonical general relativity, the operational mapping between coordinate labels and measured durations is represented, in a 3 + 1 split, by separate lapse, shift, and spatial-geometry fields. Each field induces a distinct closure requirement between data, kinematics, and stress–energy bookkeeping. If any closure is imposed implicitly, the residual is often absorbed into an effective gravitating component. We therefore restate common dark-matter arguments as time-domain closure tests within general relativity and Standard-Model matter, emphasizing falsifiers that move the burden onto explicit clocks and constraint-consistent dynamics.