Any fool can be honest, for it is only what he knows. A wise man is aware of when to share the truth.
Turns out, recorded knowledge doesn't stay forever and the majority gets buried and lost in only a few decades. Books go out of publication and are lost and thrown away over time, websites with images and important data get shut down and deleted, artworks are destroyed and burned, and most ancient forms of knowledge are recorded on perishable mediums that have since decomposed.