1). CONFIRMATION BIAS  The tendency to process information by looking for, or interpreting, information that is consistent with one's existing beliefs. We all do this and it's the hardest one to resist. How many of us have read JFK books one after another, without purchasing any that make the contrary case to our beliefs?  2). GROUPTHINK Groupthink is a phenomenon that occurs when a group of individuals reaches a consensus without critical reasoning or evaluation of the consequences or