Yes, as I understood it, this was the point. It is biased. First, you make a decision. Then you weight the importance of the various factors so that they come out appearing to support the decision you already made. Imagine, if this is true, what this means for the justice system. What it is suggesting is that jurors in a trial first decide whether or not a defendant is guilty. Then each one weights the various pieces of evidence in order to support the decision they made to begin with.