Board Thread:Theories and Speculation/@comment-1512913-20161105081557/@comment-1251315-20161105123259

The word "contradiction" implies that the anime is saying something different to what the manga said. For example, an obvious contradiction would be if the anime said that Hiruzen is the Fourth Hokage, which contradicts the manga who says that the Fourth is Minato.

But if the anime states something which cannot be found in any other source, then it's not a contradiction because it isn't contradicting anything.