From the clinical sense, there is a difference between a mental/habitual addiction of routine and a physical addiction.  Weed cannot create a physical addiction.  That type of addiction is mental NOT physical.

 

Booze can over time create a physical addiction in which the body goes through symptoms of physical withdrawal if alchohol is not in the system.  You don't get that wiith weed.  You get cranky, and you THINK you need a toke.  But you don't feel the physical pain of withdrawal like you do with alchohol, amphetimines, and opiates.

 

You take a dude that's smoked an ounce of weed a day for 5 years and make him stop cold turkey, you'll have one cranky dude

You take a heavy drinking alchoholic and cut him off cold turkey, you'll have a person who will probably have to be hospitalized... 

 

That's the difference.  I mean, seriously, did nobody else learn this stuff in high school?

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