This document discusses psychological phenomena like pareidolia and expectation effects that can cause people to perceive patterns and meanings where none actually exist. It provides examples of how pareidolia has caused people to see faces in Mars landscapes, hear hidden messages in music played backwards, and even led a scientist named Rene Blondlot to mistakenly discover "N-Rays" after being influenced by expectation effects. The phenomenon was eventually debunked when an outside physicist discovered that Blondlot and others were perceiving the rays due to pareidolia rather than any real stimulus.