So marijuana interacts with brain chemistry, and? Why is it so important to make this point about the potential for addictiveness of marijuana – albeit rather defensively? What would be more illuminating is to discuss marijuana in the context of other substances that interact with the brain's neurochemistry. But that could be difficult, since pretty much everything affects brain neurochemistry. So your point is that everything is potentially addictive? Every substance, every behavioral pattern, every experience has the potential to trigger addictive impulses in some people.

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