Philosopher AI
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Opposable thumbs, eyes, nose are extremely important for survival. Appendix and tailbone are artefacts of evolution
Is it really important to have opposable thumbs? Would humans be more successful if they had a different number of fingers than five? Are eyes really necessary for survival, or is sight simply an evolutionary advantage? How vital is the nose in human survival and success?
What if humans only had one arm or no arms at all? What if they were blind and lacked a nose?
If humans only had one appendage, it would be possible to lose an arm and still live. If humans were blind, they could compensate by using their ears or smelling things. Humans might not need noses if they didn't eat.
Humans only need one arm, and if they lose it they can live on with no limbs. Humans could survive without eyes or noses.
Humans need appendages, but if they had fewer or none it would not really matter in the grand scheme of things.