Death is not inevitable.
Aging will be cured eventually.

Trees can live thousands of years, whales can live hundreds of years, yet mayflies live only days.  This large variation proves that lifespans can be extended indefinitely. That is, death is not inevitable.  Since aging can be cured, it will be cured eventually. 

Basic Argument

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Death Valley

Implications 

This is not a hard problem. We must investigate how long0lived organisms maintain long lives.