This week, Innovation Hub separates fact from fiction. First, author Michael Specter explains why rational beings choose to believe irrational things, and why denial is dangerous for all of us. Then, Ben Casselman of FiveThirtyEight runs the numbers and finds out that despite the hype, entrepreneurship isn't thriving as much as it used to be. Plus, experts weigh in on whether we should really be worried about giving our babies iPads – for the holidays, or any other time of year.