2 lungs, 2 kidneys, 2 arms, 2 legs, 2 ears, 2 eyes, 2 nose holes. 1 brain, 1 heart, 1 liver, 1 pancreas, 1 output-only port (mostly). Why didn’t nature provide us with full redundancy for all vital body parts? Why create a semi fault-tolerant system with multiple single points of failure?
