Plot Induced Stupidity, or PIS, is when characters don't use their abilities or skills to the fullest extent as shown before, even within their personality ranges, for the sake of the story plotline. It makes lesser powered characters an actual challenge against higher powered characters in the comics.
Examples of PIS include Flash stories lasting longer than three panels, or Toy Man as a threat to Superman. Standard CBR fights exempt the contestants from PIS unless otherwise specified.
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.
Narrative hyperbole is when the narrator of a comic book says one thing while the action drawn on the pages clearly show something else. Sometimes, in the case of speech hyperbole, it is a character who says one thing, while the pages show differently. This does not mean the narrator or the character is always wrong. It only means that in the case of such conflict, the actual scenes overrule the narrator or character text.
An example of this would be the Ten-Eyed Man, who Batman and the narrator called "the most dangerous man alive", and who was actually a very lame and low-powered character.
Each side starts out with the equipment that they normally and have been shown to consistently carry on them.
For example, Daredevil would have his billy-club, but Reed Richards would not have the Ultimate Nullifier.
In a scenario fight, the contestants in whose city/reality the fight takes place are allowed access to any material resources they usually have there or of any team they're active members of, as long as they can reasonably get to them. For example, in a scenario set in the DCU, Green Lantern would have access to equipment in the JLA Watchtower, but not the Titans headquarters.
Spiderman vs. Firelord, or SvFL, is a shorthand that refers to any time when a character performs a feat that their powers and skills should be blatantly insufficient for, and is not repeated or is rarely repeated again relative to the character's overall established career, as well as the character's opponents' established showings. In statistical terms, it is an outlier, something that is radically beyond the character's established capabilities.
For example, Spiderman defeating a herald of Galactus is a case of the SvFL exemption; however, Batman being able to sneak up on Superman is not because he has done so frequently under different writers.
For standard CBR fights, feats considered to fall under the SvFL exemption are not valid. Likewise, examples of writing which go against firmly set canon are also ignored. For example, in Larry Hama's run of Batman and Grell's run of Iron Man, both characters were out of character and did things very much against established canon; therefore those runs are disregarded.