1. The definition of life is fuzzy at best. Most of these definitions operate on populations, not individuals. 2. Population fitness can be optimized by many a

1. The definition of life is fuzzy at best. Most of these definitions operate on populations, not individuals. 2. Population fitness can be optimized by many activities: food gathering, art, research, supporting peers, etc. 3. Meaning is a mental construct. Arguing over the absolute "point" of life is pointless, because the epiphenomena of "value" is a chemical cascade in our brains and can be coupled to almost anything. At best we deal in probabilistic generalizations, like "most people find having children rewarding". It's equally valid for someone to find deeply rewarding value in rebuilding engines, and many do. More directly: I'm gay. I can't reproduce naturally. If you think that makes me less human, let alone less alive, kindly go fuck yourself.