kairosfocus:
"Is the CSI concept well-founded mathematically, and can it be applied to the real world, giving real and useful numbers?"
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The answer is no. If ANYONE (and especially gordy) thinks I'm wrong, let's see you coherently define "CSI", and calculate the CSI in a banana, a frog, a rock, a hydrogen atom, a dandelion, a human, a star, a galaxy, a car, a hair, and a virus. Let's see the "real and useful numbers".
As joe g would say, "You can't just say it, you have to show it."