What these studies demonstrate is just how effortlessly the brain can rationalize its behavior. Rationalization, sometimes known to neuroscientists as confabulation, is the production of fabricated stories made up without any conscious intention to deceive. They’re not lies, exactly, but neither are they the honest truth. Humans rationalize about all sorts of things: beliefs, memories, statements of “fact” about the outside world. But few things seem as easy for us to rationalize as our own motives. When we make up stories about things outside our minds, we open ourselves up to fact-checking.
...more