Your beliefs are rational, logical and fact-based, right? Well, consider a topic such as spanking. Is it right or wrong? Is it harmless or harmful? Is it lazy parenting or tough love? Science has an answer, but let's get to that later. For now, savor your emotional reaction to the issue and realize you are willing to be swayed, willing to be edified on a great many things, but you keep a special set of topics separate. The last time you got into, or sat on the sidelines of, an argument online with someone who thought she knew all there was to know about health care reform, gun control, gay marriage, climate change, sex education, the drug war, Joss Whedon, or whether or not 0.9999 repeated to infinity was equal to one--how did it go?