Any synchronization scheme that relies solely on light signals cannot test the isotropy of the one-way speed of light. The convention used to split a measured two-way delay into one-way components becomes, by construction, the result of the subsequent measurement. This is the classic conventionality-of-simultaneity problem. Quantum-Geometry Dynamics (QGD) supplies an independent resource unavailable in relativity: gravitational interaction is instantaneous within a finite, static preonic space. This paper develops a clock-synchronization protocol that exploits that fact. Two separated clocks each register, on their own uncorrected clocks, the arrival of the same distant gravitational transient. Because the transient’s gravitational effect reaches both stations at the same absolute instant, the raw difference between the two timestamps is their true relative offset, with no assumption about light’s transit time. Clocks synchronized in this way can measure the one-way speed of light directly, testing QGD’s prediction that it is anisotropic for a moving apparatus even though the two-way average remains the constant c c c. The same measurement yields the apparatus’s absolute velocity relative to preonic space. Once that velocity is known, the absolute velocity of any other object follows from ordinary two-way radar or laser-Doppler ranging. The paper corrects a specific circularity in the earlier light-only synchronization procedure given in the QGD monograph (Chapter 17) and provides a sharp empirical contrast with frameworks in which gravity propagates at finite speed. Anticipated objections from general relativity (GW170817 timing, causality, binary-pulsar orbital decay) are addressed directly.
Daniel Burnstein (Wed,) studied this question.