[ac50hz]

Record keeping, for better or worse, is essential.

Memories fade. Ink fades but rarely corrupts.

[Aerbil313]

I grew up with the stories of real people (students and scholars of the past times) being able to memorize things by just hearing or reading them once.

Seems a forgotten thing in the modern world.

[malfist]

Because it's a myth. Photographic memory isn't real. Check out the wikipage on eidetic memory. People that claimed it in the past were not telling the full truth. There are only a few examples of savants being able to recall specific things after one showing, but it's terribly narrow. Like being able to draw a horse you saw, but not human faces.

https://en.wikipedia.org/wiki/Eidetic_memory

[melagonster]

there are a lot of book teach you writing note later and give client deep impression.