Board Thread:Theories and Speculation/@comment-1512913-20180917223942/@comment-1512913-20180919141836

The only evidence we have for Magnet being Wind+Earth is Rasa's Jin no Sho profile, as he has both Wind and Earth there but no Lightning. The book has its errors though, so it's not a 100% proof, but it's the only evidence there is, so we go with it, until we get something better, assuming we ever do, like a direct statement in the manga or anime or novel or whatever.

The point of this thread is not take it as face value and question it, as it might be an error for all we know. If we went 100% by Jin no Sho, it would be a mess.