"When people's minds are attuned to the idea of action, their opinions tend to harden, making them less likely to seek out opposing viewpoints." <http://www.miller-mccune.com/culture-society/just-do-it-culture-feeds-confirmation-bias-31496/>http://www.miller-mccune.com/culture-society/just-do-it-culture-feeds-confirmation-bias-31496/ www.peoplewho.org