Final answer:
The comic technique involving mishearing key information is known as malapropism or misunderstanding, leading to humorous situations when used in comedic writing.
Step-by-step explanation:
The comic technique that involves mishearing key information is typically referred to as a malapropism or a misunderstanding. In the context of humor, this can be a deliberate ploy used by writers to create comedic situations where characters misinterpret or completely miss the intended meaning of words or phrases, leading to absurd and humorous outcomes. While the example mentioned about misattribution is not a direct use of this comic technique, the resulting confusion could be adapted into a comedic narrative where the characters' misremembering leads to humorous misunderstandings.