Let's first be clear on what I mean by “gut feelings.” So, a gut feeling — or an intuition — is based on years of experience. It usually appears quickly in your mind. So, you know what you might do, but you can't explain why. Nevertheless, [gut feelings] guide many of our personal and professional decisions. So, a gut feeling is not something arbitrary. It's not a sixth sense.
—Gerd Gigerenzer, author of the 2008 book Gut Feelings, on the podcast EconTalk.