[pmoriarty]

"There's no recipe chain that takes in Green Circuits and produces either Iron or Copper Wire. So once produced, you need to find a higher function for your products. You can't 'unmake' through a cyclic recipe."

There are Factorio mods that will give you access to recycling machines that will let you get back the ingredients that went in to making whatever it is that you put in to them.

So Factorio's recipes can be fully cyclic, if you want.