I made an assumption based on how I understood the article. After reading your comment, I searched around for more info. Unfortunately, I can't find anything de

I made an assumption based on how I understood the article. After reading your comment, I searched around for more info. Unfortunately, I can't find anything definitive. There are a lot of articles about when and why it was removed (alphabet song based on Twinkle Twinkle Little Star), but not much about why it was added. The common speculation seems to be that they put it in there simply because it's a symbol. I think about the alphabet as representing a class of characters that represents sounds, which biased my interpretation of the story. However, others could have thought of it as a list of symbols to know in order to read (besides punctuation).