Then it's not Arabic.
Anyway, is everyone still okay with the genitive case staying the prepositional case? In all honesty, I'm still for the 20+ case system.
But that's impractical.

I'm OK with the genitive case being the prepositional case.

But anyways, how would that 20+ cases system be? Which cases would it include? Most of them would be locational cases, right?

I think we could have a rich case system for precise indications, and maybe a set of prepositions for simpler assertions: We'd have a word meaning "by the" that could act as the adessive, inessive, allative, illative, etc. And another for motion away from, or being off of something...

This chart[1] seems neat!

[1] http://en.wikipedia.org/wiki/List_of_gr ... asic_cases

Classical Arabic had a three-way case system, though, with -u as nom. sing, -i as gen. sing (and also used with prepositions), and -a for acc. sing.

Yeah I know. Do you mean that he was referring to the genitive used with prepositions? Arabic certainly had no prepositional case.

I was. The genitive is just used for prepositions sometimes; that's what I meant to say.

If we're trying to do this organically, let's see what sticks.

As much as we'd try to make this fully organic, we still need to agree or at least set the communication rules, otherwise we don't understand each others.

So, at least until people stop using it this way; which, of course, might very well happen, or not.