> Problems with understanding this concept seen here don't confirm that's the best way.

It's incorrect to jump to that conclusion. The main response from people who understand it fine is just silence.

- I'm sorry, Michael for that, my bad.

I tried a little to understand the groups in Mol and it wasn't that hard at all, I have to admit that once it's caught it is not that complicated and it really has logic and consistency which makes it very useful on a daily basis.
I will never again doubt your talent and passion to make MoI such wonderful tool for us.

Marek