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In The Matrix, how are babies made?
(iusearchlinux.fyi)
A "Showerthought" is a simple term used to describe the thoughts that pop into your head while you're doing everyday things like taking a shower, driving, or just daydreaming. A showerthought should offer a unique perspective on an ordinary part of life.
The answer is in the movie. When explaining the Matrix to Neo, Morpheus says: "There are fields, endless fields, where human beings are no longer born, we are grown."
https://youtu.be/IojqOMWTgv8
Doesn't specify the exact how, but it's strongly implied that it is through either cloning or artificial gestation.
Why even grow them with arms and legs if they are just going to be batteries? Wouldn't it be easier to just grow cows instead?
Because shut up. /s
But really though, the entire concept of using humans as batteries is absurd. Don't think too hard about it, just enjoy the movie.