Tina mistakenly believed all of her classmates were familiar with the entire series of harry potter films and delivered her informative speech on the symbolism found in them.
which guideline of the k. i.s. s. (keep it simple, students) rule did she violate?

The simplicity.

Explanation:

Because she  assumed that all of her classmates knew the entire Harry Potter series so if only one of them didn't know it, her speech was difficult to understand if not meaningless, breaking up with it the objective of this theory that is keep it simple.

No cognition

Explanation:

The principle is to flow with the intuition of the listeners but the use of specific symbols from a movie which the listeners are not aware of faulted the whole principle of kiss.

answer; presidential election years;