What does this equation mean?

Sorting the claims above by what actually supports them: that an old black hole’s radiation is close to maximally entangled with its remaining interior, that scrambling proceeds no faster than a chaos bound saturated by horizons, and that a small system thrown in becomes recoverable from a matching small sample of later radiation are OBSERVED-theory baselines, DERIVED and inherited whole from Page, Hayden and Preskill, Sekino and Susskind, and Maldacena, Shenker, and Stanford [ 5 , 1 , 2 , 3 ] . That a global symmetry delays and partially obstructs that same recovery is likewise inherited, from Nakata, Wakakuwa, and Koashi’s direct analysis of the symmetric case [ 8 ] . What is PROPOSED, and belongs to this article alone, is the explicit pairing of $t_L(\epsilon)$ and $t_G(\delta)$ as two differently shaped operational thresholds built on the same radiation, the covariance and conservation checks run on $\Delta$ $t_{LG}$ , the Page-formula illustration of the exponential approach to the entanglement ceiling, and the toy accumulation model — together with its own reversal at loose tolerance, reported honestly rather than suppressed.