Opinion or Certainty

I express my opinions here and somewhere on the web exists the exact opposite blog, or perhaps thousands of exact opposite blogs.  How then do we proceed?  No matter what my or thousands of opinions represent, we have the ability to discern the truth.  It is the anthropological equivalent of the cosmological principle.  The cosmological principle in essence says that the Universe is knowable and is playing fair with scientists.  The world and society are knowable and is playing fair with us.  We do not play fair with it.  We manipulate and capitulate to the social conventions of our time and defend it with the vagaries of language.  This is the core of contention in public discourse and policy.  But society is knowable and our goal as a society is universal:  survival.  This is where I begin, with the premise that our survival and evolution as a species is the ultimate good and that we have the intellectual tool (science) which can provide us with the solutions to our troubled advancement.  Therefore, the politicians wasting money and the salivating masses dutifully following the siren songs of advertisers are detrimental to our survival.  It is not an opinion, it is a certainty that if we continue on the road we are on, it will lead to our extinction.