Interrogation does not include coercion. I keep trying to explain that to you. All interrogation includes is asking questions. That's what the word means.
Should I worry about coercion? Of course. Should I worry about interrogation? No, ask away, I don't have to answer. Interrogation is not another word for coercion, interrogation does not include coercion. We have separate words for separate concepts.
The combination of interrogation with coercion is bad. Two separate words for two separate concepts. It's not the interrogation that makes the combination bad, it's the coercion. We don't have a name for that combination. If we want to be accurate, if we want to be precise, we need to use both words when describing that combination.
People are sloppy. Sometimes they misuse a word as shorthand for a longer description. Using "interrogation" as shorthand for "coerced interrogation" is a misuse. You can tell from context when people are misusing words like this, and if it isn't clear, you should assume the proper definition. When the FBI says "advance the science of interrogation", they mean that they want to know how to ask better questions. Asking questions is an art. Some people are better at it than others. The FBI would like to add a little science to that art, so they can train their people to ask questions that get them better answers. There's nothing wrong with that, there's no threat in that. I used to provide technical support to sales, so I went to many sales training classes. Some of those classes taught me how to ask better questions. What's wrong with getting a better understanding of what the customer needs?
Your concerns are legitimate. But you're using the wrong words for them. You shouldn't fear interrogation. You should fear beatings, coercion, and torture. It hurts when you are beaten during interrogation. But the interrogation doesn't hurt, it's the beating that hurts. You can be beaten without any questions being asked. That's not interrogation, that's just a beating. Please use the proper words. Don't say interrogation when you mean coercion. Don't say interrogation when you mean torture. Interrogation is not painful, interrogation is not harmful, interrogation is not evil, interrogation is not immoral. We have words for inflicting pain, words for causing harm, words for evil and words for immoral. Use those words when that's what you are talking about. When you use the wrong words, you enable those who commit evil to hide behind safe words. Don't call torture interrogation, call it torture. Don't call waterboarding interrogation, call it torture. Don't help evil bastards hide behind euphemisms, use the proper words. Interrogation is a word for a respectable activity. Don't use it for despicable actions, use the proper words that make it clear that the actions deserve contempt.
There are other ways people misuse language to enable evil. A reporter should not say that the suspect resisted arrest. That's an opinion, not a fact. The reporter should say that the suspect was injured while he was being arrested. That's a fact, not an opinion. The reporter should say that the suspect was charged with resisting arrest. That he was charged is a fact, and it doesn't assume that he is guilty of the charge. Maybe he did resist, maybe the injuries couldn't be avoided, or maybe a dirty cop took out his frustrations on the suspect. Sloppy language hides the injury, sloppy language assumes guilt, sloppy language enables dirty cops. Accurate, precise language makes facts available. That's what I'm asking for. Don't say interrogation when you mean something else.