[robertpaulsen]

"How can one have documentation that disputes a hypothetical future event?"

Simple. Some credible organization or individual who says that legalization will not increase usage.

[Ken H]

I doubt any credible organization is going to make such a claim. It's all guesswork no matter which side you're on.

I do know that Holland, which has relatively mild sanctions against heroin use, has a lower rate of heroin addiction than Iran, Singapore, and the US.