BB so that people with sight cannot understand what the blindmen are reading...!
you have a good question.. why not use engraved or raised english alphabets instead.
The problem i think is the way alphabets are written. and they are quite close with each other too. secondly, some alphabets can be confused with others..
so proll that was the reason behind using dots..
and then we have Morse code..! dots and lines.. !!
they could have used the same dots for both no..!? so by learning braile, the blinds would have more talent as they would also know Morse code..!
ironinc right..! but not practical...!
