The Asymmetry of Temporal Knowledge: Why the Past Is Knowable and the Future Is Not

Why can we know the past but not the future? This paper argues that the asymmetry is notmerely epistemic but structural, arising from three interconnected features: (1) traces—thepast leaves physical records that constrain reconstruction; (2) convergence—multiple pastscan lead to the same present, but we occupy only one future; (3) axiom systemtransitions—the future may operate under axiom systems that do not yet exist and cannot bepredicted from within current axioms. The past is "knowable" because traces exist andreconstruction is constrained; the future is "unknowable" because no traces exist andpossibility space is unconstrained. Furthermore, the knowability of the past is itself limited: weknow not "what happened" but "what traces remain"— a dimensional reduction that losesmost of the past's actual structure. The asymmetry is real but both directions involvefundamental limitations: the past is partially recoverable from traces; the future is notrecoverable at all because there is nothing yet to leave traces.