I don't know about ALL forms of autism, there are many many different versions of this mental syndrome.

My younger brother has asberger's disease and what that is in a nutshell is, he sees, unerstands, and conveys messages in a MUCH different way than the average person. Let me give you an example.

Let's use the new High Definition digital broadcasting as our metaphor.

People with older analog TVs will be required to buy and install a digital broadband converter (Let's call this the little metal box) in order for their TVs to communicate with the New High Definition Digital broadcasting.

Now, let's say that we are the Analog TVs WITHOUT the little metal box and that people with Asberger's disease are the High Definition Digital Broadcasting. In order for us to communicate in a fully compatible way, all the Analog TVs need to have a little metal box (Or simply learn how to translate hidden messages being recieved, and how to translate messages going out)

If you don't get it I'm sorry, that's how I can explain it. I'm saying that I'm unsure of whether or not Marijuana can cure merely a built in system of learning and communicating.

If you're still having a hard time understanding I'll go more in depth

I'm sure it has many many uses in other genres of Autism though!!