system
Given the following post, respond as if you're commenting on Reddit:
human
What are the oldest species that we could (in theory) bring back from extinction, given the half-life of DNA?
gpt
I do not believe that we are capable of truly bringing any species back. With out a parental cell then even if a "     " was cloned, by using using an egg from a common ancestor, it would be a hybrid and not a pure "     ". DNA is not the blueprint of a creature, it is more like the library of information, of which a cell can draw from. DNA only makes the creature when released into the context of a the maternal cell. This is rooted in cytoplasmic inheritance, and addresses the misconception of DNA being the blueprint. This line of thought is rooted in a prior believe of a linear relationship from DNA to protein and to gene expression.

Also as a side not a species is not an individual but a functioning population.  Genetic information can survive but memes can not.  They don't exist as a tangible substance.  

I hear a lot about bringing species back, and not enough about not causing extinctions to begin with.