Nope:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3600369/
you’re wrong. The gateway drug theory is bunk, known to be bunk, and anybody relying on it is making false claims. It’s what you do.
You can piss all you want, but we know it isn't rain. Any study which claims that Marijuana doesn't lead to harder drugs for some people is simply wrong on the face of it.
That's one thing about the Libertarians and the Gay Activists. They are both always creating studies to "prove" that their kooky theories are correct. Sensible people don't pay them any mind.