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This interpretation resolves logical conundrum.
*Invariance vs Covariance*
(1) The principle of inseparability between relativistic interval measurement and covarying scale has been discovered. The Lorentz Factor works as conversion ratio between the scale of virtual covarying observational apparent measurement and the scale of real invariant natural intrinsic entity. This simple logic harmonizes improper and proper interval measurements. It preserves the spacetime invariance. It also conserves causality between intrinsic natural entities and apparent observational measurements.
(2) The Reciprocity has been found necessary between Lorentz Transformation and its Inverse Transformation for the same event viewing from two relative frames . Double applications of Lorentz transformation from both relative frames for the same event and double reverse inferences caused paradoxes. The concept of reciprocity resolves them, and also preserves the principle of NO preferred frame.
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With gravitational horizons of cousin universes in the Universe neighborhood, dark energy could be universal gravitational attractions among neighbor universes. Our Universe may not be alone.