Soon after dying, participants are stored in a liquid nitrogen solution to prevent decay until that time when death becomes a reversible phenomenon.

If the solution space is limited in scope and impact, or the decision is reversible, give the team space to solve the problem, even it there's a good chance they'll get it wrong the first time.

One theory about why antimatter exists was developed by John Wheeler and Nobel laureate Richard Feynman based on the idea that physical systems should be time-reversible.