Knight, unfortunately I am not sure who is under the propaganda, you or israfil. The references you quoted are nothing but propaganda, they are not science. The only scientific element there is the content of Marijuana, on which you are basing your argument. There are many intoxicants / drugs which are not alchohol based.

Marijuana is a drug, it is having intoxicant effect, it definitely harms a great deal. May be you havn't been able to find out the damage it does. I have seen many people damaging their life with it, moving to heroine/cocane once they get saturated with marijuana. Ifyou have taken it, you know it takes over your brain, not necessarily a depressant, could be stimulant as well for some. It is obviously different than alchohol.

Firstly, it would be very nice if you could at least state your sources toward your 'facts', so we can verify them ourselves.

Now we'll start;

Marijuana, Weed, Pot, Ganja, whatever you want to call it, is NOT an intoxicant, therefor not a depressant. Marijuana's active ingredients include THC, and Cannaboids. These 2 chemicals are not intoxicants. Alcohol is an intoxicant, maybe this is the source of your confusion. This is the reason that in America they changed the former DWI (Driving While Intoxicated) to DUI (Driving Under the Influence), because DWI does not pertain to Marijuana since it is not considered an intoxicant.

If in america they don't call it intoxicant, does not mean it isn't. They don't consider Alchohol to be a drug and ban it like other drugs, because it's part of their culture. Considering the effects of alchohol anyone will easily put it in the line of other drugs.

Secondly, you stated that Marijuana is a drug that leads to many other drugs, this is nothing but a very very biased myth. http://www.webmd.com/content/article/54/65298.htm - Marijuana is not a Gateway Drug (drugs leading to other drugs). And to further amaze you, Marijuana is not addictive either. In fact, a cup of tea has more of an addictive property than a joint of Marijuana.

Pure Propaganda, Marijuana do lead to other drugs when the alternative is available. Most of the marijuana smokers in Afg land up into heroine and cocane. There are millions of them in the world. Watch some of the documentaries on the subject. 

I have never seen any scientifically based claims that state that Marijuana slows down your rational behavior or reactive skills.

Science doesn't answer many of our questions yet, that doesnot mean that it doesn't exist? Look at a addicted person on marijuana, you won't need science to understand his conditions.

To further dispel the many myths of Marijuana:

Marijuana's negative effects are very minimal. The only scientifically based study on marijuanas negative effect is the byproduct of smoke when administering the drug. And on top of that, the smoke produced from pot is nothing compared to the smoke that billows out of a cigarette, cigar, or even Hookah. More interestingly, this minute smoke problem can be easily avoided as Marijuana is also easily digestible, thus skipping the whole smoke session. Now anyone can argue that Marijuana has no harmful effects at all. You can never over-dose on pot either, so this is not a problem at all.

A statement of convenience, depends what you know about its effects and how you view those. What you say minimal might be dangerously damaging.

http://ajrccm.atsjournals.org/cgi/gca?SEARCHID=1127855512481_8334&AUTHOR1=Tashkin%252C%2BD&FULLTEXT=Marijuana&JOURNALCODE=&FIRSTINDEX=0&hits=10&RESULTFORMAT=&gca=155%2F1%2F141&sendit=Get+All+Checked+Abstract%28s%29 - Marijuana does not cause emphysema, unlike tobacco
http://www.webmd.com/content/article/122/114805.htm - Marijuana does not cause cancer (and if you  smoke it you are actually slightly less likely to get cancer)
http://www.webmd.com/content/article/122/114805.htm - THC actually helps cleanse the lungs, preventing tumors
http://www.webmd.com/content/article/70/80972.htm - Daily marijuana use doesn�t damage your brain
http://www.webmd.com/content/article/87/99417.htm - There has never been a study to link marijuana with psychological problems
http://www.webmd.com/content/article/54/65298.htm - Marijuana is not a Gateway Drug
http://www.webmd.com/content/article/104/107266.htm - Marijuana fights hardened arteries
Marijuana has both st http://www.webmd.com/content/article/92/101877.htm - alled the growth of and http://americanmarijuana.org/pot.shrinks.tumors.html - eliminated brain tumors in rats
http://preventblindness.org/resources/factsheets/MarijuanaFS01.PDF - Marijuana can prevent blindness
http://www.talkleft.com/story/2004/05/18/601/89840 - Marijuana is less addictive than caffeine.
http://www.viewzone.com/maryjane.html - Marijuana Prevents Alzheimer's Disease
http://www.drug-overdose.com/marijuana.htm - You can't over-dose on pot
http://en.wikinews.org/wiki/Study_finds_marijuana_use_leads_to_brain_development_in_rats - Study finds marijuana use leads to brain development in rats
http://www.abcnews.go.com/Health/Drugs/story?id=3822220&page=1 - Study shows kids who smoke pot are actually more successful .
http://www.foxnews.com/story/0,2933,312132,00.html - Marijuana Compound May Stop Breast Cancer From Spreading .

You have given ref of a lots of opinions/studies (Not science) which says, what marijuana does not cause. But not one, what it causes. It can sound very funny if someone goes deep into it; like saying having unsafe sex with HIV (AIDS) patients don't cause lung cancer, heart desease or malaria, but never go on to say that it causes AIDS leading to death.

Dear Knight, please understand the difference between study and proven science. Studies are basically opinions, not necessarily pure science.