Confirmation Bias is a psychological principle/logical fallacy. This recent (2015) study documents how people will seek out ways to justify or confirm their beliefs when presented with cognitive dissonance.
Date:
November 16, 2015
Source:
University of Iowa
Summary:
Once people reach a conclusion, they aren't likely to change their minds, even when new information shows their initial belief is likely wrong and clinging to that belief costs real money, new research shows"