This paper establishes the substrate‑native limits of temporal traversal within the MID/QC framework, distinguishing between what is physically permissible for mass/matter and what is categorically inaccessible to biological life and consciousness. Time travel is shown to be a geometric consequence of substrate tension, coherence gradients, and configuration accessibility—yet these same geometric rules impose a hard metaphysical boundary on systems that maintain internal coherence through biological or conscious processes. The work clarifies: the substrate conditions under which temporal displacement is possible, why matter can traverse temporal configurations while life cannot, the role of memory state and coherence continuity in defining biological temporality, and the emergence of a metaphysical horizon where physical law and conscious coherence diverge.This paper completes the temporal arc of the Foundation Series by defining the outer boundary of MID/QC physics and establishing the conceptual interface with future metaphysical work.
Chadwick Rasque (Sun,) studied this question.