>[!warning]
>This content has not been peer reviewed.
The Past is the only state of [[Information]] that can be [[Sensing|Sensed]] as [[Translation]] is a chain of [[Event|Events]] through [[Proper Time|Time]].
---
## RRT Formalization
**Logic:** The [[Past]] is the set of completed [[Translation]] [[Event|Events]].
**Constraint:** It is the only state of [[Information]] that can be [[Sensing|Sensed]].
___
## In the Equation
**"Completed Events"**
The [[Past]] is the set of [[Translation|Translations]] where the energy tax ($k_B T \ln 2$) has already been paid and the refresh intervals ($\tau$) have already elapsed.