"Life is a self-sustaining chemical system capable of Darwinian evolution."
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This is a complete definition of life.
This specifies a mere subset of the defining qualities of life.
This definition of life is too restricted.
Other: please comment
This definition is often credited to NASA astrobiologist Gerald Joyce.
This question is managed and resolved by Manifold.
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Other: This is a description of almost all life we encounter in the wild, but is not a necessary property of life, because aliens that got designed by some proto-aliens and aren't capable of evolution but had lots of life-like properties would according to most people be accurately described as living