Honestly, I've found good insight before while under the spell of cannabis.

There have been numerous times where I've been working on something all day and get stuck somewhere, then blaze up and solve the problem. To me, it just helps you think outside of the box. I've written stoned papers for college before and would do better on them than if I was sober. I once got a compliment from a professor saying that this one paper (that I wrote completely stoned) was extremely good; when compared to my other papers from the class, it scored significantly higher than most of my other papers. Looks like the feds are wrong again about marijuana's apparent effects on learning capabilities.