For symmetric signed Laplacian dynamics obeying a Rényi-2 entropy Second Law, the arrow of time becomes operationally detectable after a finite delay, and is never misidentified before that delay.
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Delayed Arrow-of-Time Detection in Signed Laplacian Dynamics
For symmetric signed Laplacian dynamics obeying a Rényi-2 entropy Second Law, the arrow of time becomes operationally detectable after a finite delay, and is never misidentified before that delay.