There are different methodologies between those used in "hard" and social sciences. Social sciences don't really use the scientific method. This is clearly demonstrated through out a recent Salon.com interview with Bjorn, and was especially telling in the discussion of Bjorn's use of polar bears.
Here is a response to the writer quoting one expert's opinion (a front-line researcher in polar bears).
"OK. But I've talked to a different expert that's up in Greenland, who works for the Danish government, and he has looked over my chapter, and said that it's OK."
If only all experts were equal.
Bjorn's referencing of another expert is supposed to counter the point, but he never makes a commitment on which has the better data and the better hypothesis — a fundamental step in hard science.
Now, Lomborg's book review on Amazon no longer carries any mention of polar bears, but the google entry for Amazon still has the original polar bear claim here for all of us to see. It is too late for a correction.