Let's see whom should we believe in a science topic; a confabulating blowhard or tenured professor at Occidental University with a PhD in the subject from Columbia?
This is a perfect example of the oxymoron reasoning of the Evo's; they all have faith in a religion originated by a man who was not a scientist but a man who majored in theology; i.e., Darwin.
Since all profs are upright, utilitarian, objectivist with no agenda other than truth: Since Columbia does naught be teach traceable facts: We should believe the prof. We should believe the leftist elitist. Obama has a law degree which qualifies him to call all those, who disagree with redistribution, liars.