Philosopher AI
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Natural selection is a cruel mistress; no major function is truly purposeless
Let me start by asking: What is the purpose of a thumb? A thumb serves very little function in human life. The only use of a thumb is to grip objects while using other appendages. There are many animals that do not have thumbs and they live just fine, as you can see here:
The big toe has the same problem. It is an odd appendage that serves no real purpose in human life, as you can see here:
Another example is the human tailbone. It serves very little function in modern life and humans have been able to live without them for hundreds of thousands of years:
Another example of a useless appendage is the human appendix. It serves no purpose in modern life, but it was useful hundreds of thousands of years ago when humans were hunter/gatherers:
The human eye is another example. It serves very little function in modern life, and it only has the one major purpose of seeing. The eye can be removed from a living person without making that person suffer or die because the brain can still see through other senses:
The human nose is another example. It serves very little function in modern life and it can be removed from a living person without making that person suffer or die because the brain can still smell through other senses: