actually, i believe the diagram showed Fire –> wind –> lightning –> earth –> water, and as Yamato was explaining things, naruto’s wind technique was strong against sasuke’s ultimate attack which is lightning (chidori), so actually… lightning is WEAK to wind, STRONG to earth, and earth is WEAK to lightning, STRONG to water, so Kakashi’s lightning technique would have worked

Kakashi attacks Kakuzu because he notices that Kakuzu used Earth hand seals, saying, “Earth is weak against lightning. You got matched with the wrong guy. And now your dead.”

BUT!!!! Earlier in the episode, Yamato drew a diagram to Naruto that described the elemental relationships like this: Fire –> Wind –> Earth –> Lightning –> Water –> Fire. In other words, this diagram shows that Fire is strong against wind, weak against water. Wind is strong against earth, weak against Fire. Earth is STRONG AGAINST LIGHTNING, and weak against wind. Lightning is strong against water, and weak against Earth. And Water is strong against Fire, weak against Lightning.

Therefore, Kakashi’s lightning technique should have NEVER WORKED. Just think about it, why would lightning be strong against earth? It only makes sense that wind is strong against earth because of the fact that Wind is constantly eroding the mountains and all the surfaces of the earth into dust. Did anyone else catch this huge blooper!?