You are clearly posting a comment comprised of letters of the alphabet. How would one do so without knowing the alphabet, assuming you typed it out rather than dictated it. And well, you also read the original reply. So are you having all that dictated for you? Or are you implying the reading/writing does not require knowing the alphabet (which is difficult to believe, but who knows)?
About the use of an alphabet, have you used a dictionary or any other system that is alphabetically ordered?
The last time I used a system that is alphabetically ordered was in a CD shop 10+ years ago. Im not being sarcastic but I use a dictionary regularly, I just search for word using Google.
By this, do you mean that you can't read? Or you can't remember the ordering of the letters? Or that you can recognize whole words but not as being made up of individual letters?
Even worse if it is a foreign alphabet.