Then there is "Alice in Wonderland."
The aim of the Alice in Wonderland or confusion technique is to confound the expectations and conditioned reactions of the interrogatee … The confusion technique is designed not only to obliterate the familiar but to replace it with the weird … Sometimes two or more questions are asked simultaneously. Pitch, tone, and volume of the interrogators' voices are unrelated to the import of the questions. No pattern of questions and answers is permitted to develop, nor do the questions themselves relate logically to each other.
If this technique is pursued patiently, the manual says, the subject will start to talk "just to stop the flow of babble which assails him."
Easily the most famous routine is "Good Cop/Bad Cop," in which one interrogator becomes the captive's persecutor and the other his friend. A lesser-known but equally effective technique is "Pride and Ego," "Ego Up/Ego Down," or (as the more pretentious Kubark Manual puts it) "Spinoza and Mortimer Snerd," in which the "Ego Down" part involves repeatedly asking questions that the interrogator knows the subject cannot answer. The subject is continually berated or threatened ("How could you not know the answer to that?") and accused of withholding, until, at long last, he is asked a simple question that he can answer. An American POW subjected to this technique has said, "I know it seems strange now, but I was positively grateful to them when they switched to a topic I knew something about."
CIA psychologists have tried to develop an underlying theory for interrogation—namely, that the coercive methods induce a gradual "regression" of personality. But the theory is not convincing. Interrogation simply backs a man into a corner. It forces difficult choices, and dangles illusory avenues of escape.
A skillful interrogator knows which approach will best suit his subject; and just as he expertly applies stress, he continually opens up these avenues of escape or release. This means understanding what, at heart, is stopping a subject from cooperating. If it is ego, that calls for one method. If it is fear of reprisal or of getting into deeper trouble, another method might work best. For most captives a major incentive to keep quiet is simply pride. Their manhood is being tested, not just their loyalty and conviction. Allowing the subject to save face lowers the cost of capitulation, so an artful interrogator will offer persuasive rationales for giving in: others already have, or the information is already known. Drugs, if administered with the subject's knowledge, are helpful in this regard. If a subject believes that a particular drug or "truth serum" renders him helpless, he is off the hook. He cannot be held accountable for giving in. A study cited in George Andrews's book MKULTRA found that a placebo—a simple sugar pill—was as effective as an actual drug up to half of the time.
https://www.theatlantic.com/magazine/archive/2003/10/the-dark-art-of-interrogation/302791/