Here, an alternative theoretical prediction of 𝑎 μ is determined based on a simplified expression for the muon magnetic moment anomaly that does not include Planck's constant. The simplified expression is discovered by treating lepton-photon interactions in a hydrodynamic dual space. This simplification is enabled by introducing "universal diffusivity" as a constant of physics with SI units of meters squared per second. An experimental value is determined based on a diffusive master equation that is derived from a space-conserving treatment of hydrodynamics under the constraint of time-reversal symmetry, as described in Hawkins et al. (2020) . Its introduction is motivated by the findings reported in Trachenko and Brazhkin (2020) , where "elementary viscosity" is introduced as a new physical property with units of [kg 1 m 2 s ]. The novel contribution of the present work is that the mass term included in elementary viscosity is eliminated and the result subsequently enables a novel prediction of the muon magnetic moment anomaly. The prediction is achieved by substituting apparent hidden variable definition of Planck's constant into equation (2) along with an experimentallydetermined value for 𝜄 0 . Finally, a tension between the prediction of the minimum viscosity of muonic hydrogen predicted with equation ( ) is noted, with implications for future experiments. This article is organized as follows. First, the hydrodynamic dual space is developed as a diffusive master equation in accordance with the treatment of low-Reynolds number flow described in Hawkins et al. (2020) . That treatment preserved three-dimensional space while also modeling one-dimensional transport. Then, the hydrodynamic dual space is postulated to correspond to electron-photon interactions between atomic orbitals, as described by the Planck-Einstein relation given as 𝐸 * -𝐸 = 𝐸 em = 2𝜋ℏ𝜈 em , where 𝐸 * is the energy level of the excited state, 𝐸 is the energy level of the ground state, and 𝜈 𝑒𝑚 is the electromagnetic frequency [s .