Character Induced Stupidity
Character Induced Stupidity, or CIS, refers to any natural mental limitations that characters impose upon themselves and reduce their ability to use their own skills and powers effectively. Unlike PIS, CIS does not occur because the plot requires it, but because the character is genuinely that dumb.
Examples of the CIS-afflicted include characters such as Rhino or Jar Jar Binks. Standard CBR fights do not exempt the contestants from CIS.