I used to write papers in a fractal form. A short one would go like:

In my opinion, A is true. A is true for at least three reasons: B, C, and D.

B is true for at least three reasons. First, E. Second, F. Third, G. Therefore, B is true.

C is true for at least three reasons...

D is true for at least three reasons...

In conclusion, A is true.

If I wanted a longer paper, there would be subparagraphs under B, C, and D, in the same form. For my thesis, each of those subparagraphs got sub-subparagraphs. You can guess what I would do if I ever wrote a book.