I'm gonna copy and paste this from another thread. Still my post, just too lazy to write it again.

While I love the work that NORML/MAPS has done in the field of marijuana research (I didn't check the link, but that's pretty much word for word of the report they released), they have left out some clue words that every single scientist should be able to say in their sleep. However, they also do include words and phrases that allude to the test being somewhat less than 100% accurate.

First, you have to consider the condition. They used a very low-grade cannabis, and it is very possible that this could have affected test results.

Second, I don't believe they did take into account the amount of smoke lost through the process of smoking with joints. Whereas a bong has little to no smoke not being taken into the lungs, this isn't true of joints. Ya see my point?

What they didn't tell you they meant was that that test proved true for the conditions they were using. Just because one time something happened a certain way does not make that the rule.

Ya gotta take every report you read, from both sides, with a grain of salt.