On: Feathers are one of evolution's cleverest inventio...

[thfuran]

Evolution doesn't do back propagation.

[arrow7000 → thfuran]

The evolutionary fitness of a particular adaptation helps spread the genes that causes the adaptation. I think backpropagation is a very apt description for that phenomenon

[klyrs → arrow7000]

That's propagation.

[cies → thfuran]

I stand corrected. Thanks.