Thought-terminating Clichs are words or phrases that encourage critical thought.
A thought-terminating cliche (also known as a semantic stop-sign, a thought-stopper, bumper sticker logic, or cliche thinking) is a form of loaded language, commonly used to quell cognitive dissonance. Its only function is to stop an argument from proceeding further, in other words "end the debate with a cliche... not a point." The term was popularized by Robert Jay Lifton in his 1961 book Thought Reform and the Psychology of Totalism, who called the use of the cliche, along with "loading the language", as "The language of Non-thought". 
