This paragraph has no ::before pseudoelement. As the first element in the document flow, it should have a reading order of 1, but it doesn't; the ::before pseudoelement with a display property of "block" precedes it.

This paragraph has a floated ::before pseudoelement with a display property of "block". In the document's tag structure, the ::before pseudoelement's tag is a child of this paragraph's tag. Here is some additional text so that the float wraps properly.

This paragraph has a floated ::before pseudoelement with a display property of "inline-block". In the document's tag structure, the ::before pseudoelement's tag is a sibling of this paragraph's tag. Here is some additional text so that the float wraps properly.