T≡M Theory — Time Is Motion: Abductive Consequences of the Tempo Unification (Companion Paper v1.1)

The T≡M theory (Time ≡ Motion) posits that time is not an independent entity but identical to universal motion, identifying cosmological expansion as the root tick (Θ = ln(a/a₀)). The formal postulates, the nested motion structure, and the minimal experimental program (residual parameter ε_R) are developed in T≡M v2.1, where the weak branch was corrected to a drift form and bounded for the first time at |Δε_R| ≲ 10⁻⁸. In this companion document I apply an exercise in abduction — inference to the best explanation — on the central premise: I assume the Tempo unification is correct and systematically examine what happens to open problems in physics when the distinction between time and motion is removed. I organize the result in three levels: (1) problems that the premise dissolves conceptually without additional machinery (the arrow of time, the problem of time in quantum gravity, empty time, the nature of clocks, the flow of time, the time-motion circularity); (2) already-explained phenomena that are reinterpreted with greater parsimony (time dilation, entropy, dark energy, the event horizon, quantum measurement); and (3) research directions that the premise opens, including speculative extensions. Version 1.1 synchronizes the companion with the correction introduced in T≡M v2.1 (the unobservability of a constant residual and the move to a drift ansatz), renames the residual parameter ε_R, and adds the most promising new direction: the coherence susceptibility χ_R of the companion framework Coherent Data, with the tentative linking hypothesis ε_R ≈ λ·χ_R — pointing to a potential T≡M-specific metrological signature in the comparison of nuclear versus electronic clocks. I close with a systematic abduction table and an open invitation to formalization.