I don't understand the logic behind EE3. "Equivalent Exchange", is there some logic to the name? Why is an Ender Pearl equivalent to 4 Iron Ingots? I feel guilty every time I use that recipe. It would make more sense to me if, for example, a Blaze Rod and a bucket of water gave an Ender Pearl, and vice versa with a bucket of lava. But Iron Ingot? Does anyone know what the rationale behind the EE3 exchanges is?