You're not going to believe what I'm about to tell you - The Oatmeal
This is a comic about the backfire effect.
The Barnum effect, also called the Forer effect, or less commonly the Barnum-Forer effect, is a common psychological phenomenon whereby individuals give high accuracy ratings to descriptions of their personality that supposedly are tailored specifically to them, that are in fact vague and general enough to apply to a wide range of people. This effect can provide a partial explanation for the widespread acceptance of some paranormal beliefs and practices, such as astrology, fortune telling, aura reading, and some types of personality tests.
Repeat After Me - Why can't anyone replicate the scientific studies from those eye-grabbing headlines?
Psychology's reproducibility problem
For the next two weeks, a Tube station in South London will create a rip in the space time continuum. The Citizens Advertising Takeover Service has replaced 68 adverts in Clapham Common with pictures of cats.