Recover (Re-Embed) Information-Generating Processes (e.g., the Minds) of the Past Into the Future
Large number of people had died, and their memories are inaccessible to us already. There are many people and life forms that are not not alive anymore, because of unfair filter of time. I have a line of reasoning leading to conclusion that we could recover the lost information.
So, ideas how to reconstruct the lost information in the universe and embed it into future universe would be desired.
Assume nothingness, and derive everything from it.
Evolve intelligence, and hope that it will eventually reverse time.
A way to determine if a copy of a mind is test-indistinguishible from the actual mind copied.