There are scientific facts, and then their are opinions. If someone is suggesting a fact isn't a fact -- especially when it comes to a mental health issue (the primary reason we're here for) -- you should report that post. Some people may disagree with whether a fact actually is a fact, and again, the post should be reported so the moderation team can take a look at whether there's something there that needs our attention.

There are other things where the facts aren't yet known or agreed upon. That's where it is perfectly fine to state an opinion which may not be in the majority, but that you nonetheless hold.

For instance, some people believe medical marijuana may help with a range of different kinds of mental illness. Others believe not. There's very little research on this issue to help inform our opinion one way or another. (Conducting research with marijuana has, in the past, been extremely difficult because the federal government controlled all such research use, and basically approved very little.)

So right now, the facts aren't really known and so people are welcomed to express their opinion. "Well, I've been taking it for a medical condition, and it's actually helped my mood a lot as well." or "I tried it, and it just made me feel worse and triggered another depressive episode in me."

Hope this helps clarify the issue further.

DocJohn