We live complicated lives - at home and at work. We are inundated with a constant stream of data and information - and forced to make quick decisions, while we multi-task.
Angelika Dimoka, director of the Center for Neural Decision Making at Temple University, conducted a study that measured people's brain activity while they addressed increasingly complex problems (i.e., noise). As people reach information overload, Dimoka explained, "They start making stupid mistakes and bad choices because the brain region responsible for smart decision making has essentially left the premises." Research also shows that the human brain can only deal with 7 pieces of information at any one time and its literally impossible for our brains to multi-task (10 Surprising Facts About How Our Brains Work).
Based on these facts, it is clear that most of the decisions we make, aren't being made under ideal conditions. I'll let you draw your own conclusions of the implications and how you'd like to address this in your personal life.