Board Thread:Naruto Discussions/@comment-26403664-20160228225013/@comment-734582-20160323162236

Tengen Toppa Ita-Sasuke wrote: What is the difference between a databook and a fanbook? That the "fan" in the Databook's case is someone at the Jump editor's room.

BakumatsuWarrior wrote: The point of listing these things is to illustrate the fact that Kishi has a history of hyping things up, and then falsifying it later in the story. The hype is purely meant to generate fan interest. The point is that in the Narutoverse, false information is plenty, and what information exists is limited.

E.g. Kaguya faded from memory, Madara was surrounded by legends (Itachi says Madara stole the eyes and the Uchiha murdered for the Mangekyou, both were not true), the power of fully developed Transmigrants is often misunderstood.

What this teaches us is that at the points these claims are made, they're often true. Until we learned of Kaguya Hagoromo indeed was the strongest. And when Black Zetsu called Itachi invincible, well any potential challengers were dead and not returning.