There is a category of statement known as the "thought terminating cliché."
Here's the entry from a page which has been pulled from Wikipedia:
A thought-terminating cliché is a commonly used phrase, sometimes passing as folk wisdom, used to propagate cognitive dissonance (discomfort experienced when one simultaneously holds two or more conflicting cognitions, e.g. ideas, beliefs, values or emotional reactions). Though the phrase in and of itself may be valid in certain contexts, its application as a means of dismissing dissent or justifying fallacious logic is what makes it thought-terminating.
The term was popularized by Robert Jay Lifton in his 1956 book Thought Reform and the Psychology of Totalism. Lifton said, “The language of the totalist environment is characterized by the thought-terminating cliché. The most far-reaching and complex of human problems are compressed into brief, highly reductive, definitive-sounding phrases, easily memorized and easily expressed. These become the start and finish of any ideological analysis.” 
In George Orwell’s novel Nineteen Eighty-Four, the fictional constructed language Newspeak is designed to reduce language entirely to a set of thought-terminating clichés. Aldous Huxley’s Brave New World society uses thought-terminating clichés in a more conventional manner, most notably in regard to the drug soma as well as modified versions of real-life platitudes, such as, “A doctor a day keeps the jim-jams away.”
Thought-terminating clichés are sometimes used during political discourse to enhance appeal or to shut down debate. In this setting, their usage can usually be classified as a logical fallacy.]]
Thought-terminating clichés are also present in religious discourse in order to define a clear border between good and evil, holiness and sacrilege, and other polar opposites. These are especially present in religious literature.
The religious or semi-religious ideas of cults, heretics, and infidels are also often used as thought-terminating clichés, e.g. "Do not listen to him, he is an infidel," (a guilt by association fallacy) or "That line of thought sounds like a cult" (also a guilt by association fallacy).
The statement "that is a thought-terminating cliché" can itself function as a thought-terminating cliché. Once the stator has identified a first statement as a thought-terminating cliché, they may feel absolved of needing to determine whether that first statement is indeed a thought-terminating cliché, or provides useful insight, in the context under discussion.
Along these lines, a conclusion is generally considered the 'end of thought.'
While active in water politics in Arizona, I heard political slogans described as a means to shut down thought. One slogan claimed If we don't get more water, we have to give up the whole idea of living here.
The truth would have been If we don't get more water, we have to give up the whole idea of building more homes on land from which alfalfa growers can no longer afford to pump groundwater.
Also while living in Arizona, a doctoral candidate in psychology warned a class of the fraudulent intent of sentences that start with "I feel that" and conclude with a thought.
"I feel that" you make some good points.
Studying logic, formal and informal fallacies is a great way to understand dialog while hardening your heart.
Language is used for misdirection so much in public discourse, debates and campaigns.
I don't think thought-ending cliches are always undesirable. Sometimes, there is nothing else left to say and the conversation needs to be put out of its misery.
I think they are used often to evade thought and discussion, but maybe they do have their proper use and place in dialog.
I've put a few lunchtime chats with post-religion folk out of their misery by suggesting "Let's talk about sex."
From one of these last gasp chats, on the injustice of most boys and few girls having nighttime orgasms, there came the profound truth, "God fucked up."
Folks laughed, so I guess it was a thought-ending cliche too.
People say things constantly that are trite and pointless. It's a part of being mentally lazy.
For example, "well," "um," and "uh," among others.
I tell you what...
Here's an example for you: [X] is just another religion.
'That is settled dogma!'
'Please sit down, you are embarrassing yourself in front of your friends/other passengers'
'I think you are here to upset others'
'We are made of light, we have no need for doubt'
'All men are bastards, and we control the message'