Decision-making is rather illogical

Decisions Are Emotional, not Logical: This is for all you wannabe Vulcans who solemnly wonder why rationality (whatever that is) hasn't trumped religiosity. Oddly enough, many such people also seem strangely religious about their ideas about rationality.
A few years ago, neuroscientist Antonio Damasio made a groundbreaking discovery. He studied people with damage in the part of the brain where emotions are generated. He found that they seemed normal, except that they were not able to feel emotions. But they all had something peculiar in common: they couldn’t make decisions. They could describe what they should be doing in logical terms, yet they found it very difficult to make even simple decisions, such as what to eat. Many decisions have pros and cons on both sides—shall I have the chicken or the turkey? With no rational way to decide, these test subjects were unable to arrive at a decision.
Human beings are, first and foremost, emotional beings. You can deny it all you want, but that changes diddlysquat.