Dead isn't as cut and dry as we like to believe. Heart stoppage? still alive. in fact cut off the head and do a futurerama style head in a jar, still alive. Just a brain in the jar with no senses, still alive. In a coma, still alive. Vegetative state???
I've always wondered how we are going to wake up a frozen dead person.
Assuming that we can unfreeze a person with no crystallization damage or we find a way to use nanobots to do it, we will be dead. What makes us think that some day we will be able to wake a dead person?
If you could boot up the brain again by replacing damage until it's completely capable of functioning and jumping it's activity. If you could scan and decode a frozen brain for all memories and patterns of thinking it would have used and build replacements for all the parts that would need them. Then rebuild a body with cause of death fixed, and start it all running. Who says that's not reviving a near death like somebody whose heart has stopped or bringing somebody back from a perminant veggitative state?