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[–] 15 points 2 years ago

Cells make too many of them to not have a purpose. There is a large energy cost to manufacturing 10k-100k per cell. That's enough for selection to remove them if they were useless.

What's probably going on is they have an important but uncommon purpose. Like a fire extinguisher. They are in most buildings but a lot of people will never see a situation where one is needed.

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