Thought-terminating cliché

Commonly used phrase used to quell cognitive dissonance

A thought-terminating cliché is a form of loaded language, often passing as folk wisdom, intended to end an argument and quell cognitive dissonance. Its function is to stop an argument from proceeding further, ending the debate with a cliché rather than a point. Some such clichés are not inherently terminating. They only become so when used to intentionally dismiss dissent or justify fallacious logic.

This keyword could refer to multiple things. Here are some suggestions: