What are the tests of string theory? What is Milgromian string theory, and how might Milgromian string theory be tested? If the string theorists are correct about string theory and if Milgrom’s acceleration law is empirically valid when gravitational accelerations are low, then what might be the meaning of “Milgromian string theory”? What might be the physical basis of MOND? Consider 3 ideas: (1) Fernández-Rañada and Tiemblo-Ramos suggested that atomic time might be different from astronomical time. (2) Dark matter has zero inertial mass-energy and positive gravitational mass-energy. (3) Dark energy has zero inertial mass-energy and negative gravitational mass-energy. My guess is that the preceding ideas combined with Milgrom’s acceleration law (MOND) plausibly imply the Fernández-Rañada-Milgrom effect. Replace the –1/2 in the standard form of Einstein’s gravitational field equations by –1/2 + dark-matter-compensation-constant, where this constant is approximately sqrt((60±10)/4) * 10^-5 . Designate this constant by D-M-C-C. In the “Meaning of Relativity” 5th edition page 87, the formula (101) should have – κ/(2π) replaced by (–κ/(4π)) * (1/2 – D-M-C-C)^-1 on the hypothesis of the Fernández-Rañada-Milgrom effect.