Well if you're no expert in everything, then you build a strong case for it without having to say it.
For the Master Economist check here:
This is scary but could it happen here...?
Post #1 is a good example "Forgive these people for they know not what they do!!!"
Real Estate Saleman here:
How's your flood insurance?
Post #12 is a good example "Nothing in Dodge short of a casino will ever drive the housing prices up....Buying a house here is like buying swamp land in Florida or Desert in California..."
For the Politcal Scientist check any of the threads around Election day.
Purpose of that post as well as many others, is to point out truths as i see them. I like to call people on BS and also call them out when they don't point out both sides. Any good english instructor will tell you you won't be credible if you don't point out the counter points.