I did not mean to say that. If there is no, zero , gravitational effect in the center, (small or great), of a sphere, because the opposing tensions have cancelled out (like an interfering wave energy would, locally), but if each of the opposing, now overlapping or interspersing gravitational fields produce their undiminished whatever relativistic effects, would or is there not a disconnect between the existing, resulting gravitational "field "strength, and the GR SR phenomena? or If a body does not experience the effect of gravity, acceleration, as it would at the center of a sphere, why do you think relativistic effects should kick in when gravity does not? Does gravity have a dual nature, existing even when it is balancingly cancelled? thank you. (it is not off topic bsw) PS: in other words, are there two (or more) gravitational fields at work inside sphere? how about if you opened them up, started to separate them like 2 cups?