system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why is Braille dots and not letters? Is there a reason why Braille needs to be dots and not the alphabet?
gpt
Our letters are made for looking at.  They are drawn on flat and have complex curves and lines.  They’re easy to distinguish visually.  But it’s not ideal for feeling them.

It’s easier to make the raised dots than the raised letters.  It’s easier to feel and distinguish the raised dots than the raised letters.