Thought-terminating cliche (psychology)

A thought-terminating cliche is a phrase often repeated within society that quells social dissent and questioning.

Examples
There are numerous phrases and this is by no means a definite list:
 * "All's well that ends well."
 * "No news is good news."
 * "If at first you don't suceed, try, try, again."
 * "Nice guys finish last."

Fallacy
The error occurs in that it's an appeal to repetition fallacy, famous for the line 'a lie told often enough becomes the truth'. It's also a type of appeal to popularity fallacy in that many people repeat the phrase. It fails to account for contradiction (for example, some news might be good, and trying the same approach again and again may be a bad idea as it doesn't allow for trial and error or problem solving analysis).