There are a couple of errors in terminology. At first these phonemes (one symbol for one thing, instead of letters to make a word) symbolized concrete things

There are a couple of errors in terminology. At first these phonemes (one symbol for one thing, instead of letters to make a word) symbolized concrete things; Should say "pictograms", "logograms", or "ideograms", but definitely not phonemes, which are minimal units of sound in a language, and have nothing to do with writing. At the end, Fifteen other languages developed from cuneiform, Confuses the cuneiform writing system with a language that uses cuneiform. It should probably say "fifteen other languages developer from Sumerian", though I'm not certain if that's actually correct. This is a particularly surprising error given that, right near the beginning, the article acknowledges that "It was used to write at least a dozen languages, just as the alphabet that you are reading now is also (for the most part) used in Spanish, German and many other languages."