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I’m assuming they mean social engineering, and not “How would a gay person say their credit card number?”

Yes, but more specifically putting them into a sort of contradiction of their beliefs or arguments.

Doesn’t even have to be correct, but it can be confusing and cause people to say something they don’t actually mean if they dont stop and actually think it through.

If someone says something they don't mean then it doesn't mean anything. There aren't any prizes for tricking someone into singing "I love willies". The question is whether you can confuse someone into divulging something they absolutely don't want to tell.

"Gay guy says what?" historically had a pretty good hit-rate, the limit is that most people probably can't recite their credit card number from memory fast enough to be got by this

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