What is it that will differentiate a surah than something else?

The Quran challenges the non-believers in Chapter Number 2 Verse 23 to bring a surah like the Quran. What I cannot understand is that Quran is the truth but an article related to ethics or science or about any knowledge can also be true. How is a surah unique and stands out from any other true literature. I wonder if the second part of the ayah has the answer to my question. > وادعوا شهداءكم من دون الله ان كنتم صدقين Hope i have made my point clear. Regards