This is the narrative according to Ruth Kastner

To which I add:Matter-Geometry emergent from Cosmic Hologram Horizon Mind?Matter-Geometry's Einstein classical field equation

Guv + k = 0

Tuv ~ <History|Tuv|Destiny>/<History|Destiny>

in 3D + 1|

History> on our past particle cosmic horizon in 2D + 1|

Destiny> on our future cosmic event horizon in 2D + 1

According to Seth Lloyd MIT both are COMPUTERS!

Arrow of Time is asymmetry in the entropy-areas of past and future horizons of the causal diamond.