Quran is made of chapters (surah), each of which is made of verses (ayah). But there are some places that it seems some ayats are in fact one ayah, for example verses 16 and 17 of surah 35. The question is, how do we know this structure? Is this structure revealed to Muhammad by God? I mean, has God revealed that "Muhammd, this sentence I'm sending you is verse X of surah Y"? Or is it something that we just invented to categorize a body of texts that has been sent upon our prophet?
Update: Let's for a moment picture a Quran without verse numbers, and without chapter classifications. Just a continous body of text, like a story. It still has the same meaning and nothing is changed. So, what is the philosophy/why behind splitting Quran into chapters and verses? Is it something that God himself has revealed to Muhammad, or is it that men were assigning numbers to what Muhammad would say whenever he would have said it.
update2: For another example, consider verses 11, 12, and 13 of Chapter 2. Verses 11 and 12 are exactly the same as verse 13 in structure, but they are two different verses, while 13 is one verse.
Verse 11 => Command, rejection
Verse 12 => Fact
Verse 13 => Command, question (rejection in nature), fact
In other words, I would be pretty content with having verse 13 being split into 13 and 14, and mimic the structure of 11 and 12.