> They look arbitrary to you because the author doesn't explain the "Why" behind her system -- likely because it is very personal. Well, when something becomes

> They look arbitrary to you because the author doesn't explain the "Why" behind her system -- likely because it is very personal. Well, when something becomes a course, it is no longer about the author, it is about the people the author offers the course to. I don't want to discourage people from trying new things and developing their own systems, courses, whatever. I do feel the need to point out that we live in an age of immense amounts of information and one needs to be very careful not to engage in information pollution. If there is a system similar to yours, there is no need to create your own that you think is slightly better. We really don't need another flavor of candy, at some point we need less 'stuff' and less people engaging in trying to sell us something, not more. I think we've been at that point for a few decades.