A state, or condition, such that an intelligent entity's healthy state could not possibly be deduced from the current state. Essentially, the point of degradation beyond which a being can not be brought back to life.
The exact timing of information-theoretic death is strongly dependent upon the form of a particular instance of intelligence. In humans, it depends on presently unknown details of how the brain works. The current best estimates put it several hours after clinical death.
Definition from the glossary in the Cryonic FAQ by Tim Freeman.
-Back to Transhumanist Terminology metanode.