If an activist wants people to understand the main idea of his campaign the message should include a clear claim.
A clear argument is easy to understand. In social or political campaigns it is better to achieve a synthesis of the main idea. In this way, it will be easy for the reader to understand the message. Saving time is primordial.
Euphemisms are often used to imply something in their space. IE the phrase "he has kicked the bucket" is a euphemism for death. An oxymoron is a contradictory statement. IE "Jumbo shrimp" is an oxymoron because its a combo of something large with something we consider small.
You could write about 2 detectives that start investigating a new case on serial killer. And in the end one of the detectives finds out that his/her partner was the serial killer that they were trying to find.