I'm having some trouble grasping what it means for something to conduct ions. A material is ion-conducting, transporting hydrogen ions (protons, essentially), but electronically insultating? For something to conduct current, it is ultimately nothing more than a flow of charge and, I recall something, vaguely, about Franklin's misnomer in establishing that current is technically "the flow of the absence of charge," but, I guess I'm struggling with what it is to conduct a current of positive charge? I feel like the explanation is going to be shamefully obvious but, it is just not sinking in. Thank you.