You greatly underestimate how much the brain shuts down in stress situations. People may not hear being talked to, recognize familiar people or notice severe wo

You greatly underestimate how much the brain shuts down in stress situations. People may not hear being talked to, recognize familiar people or notice severe wounds. It's the reason behind such rules such as no cleanup during training - it lead to people picking up spent ammunition in real gunfights. During torture, the stress levels must be high enough so that the subject forgets that they don't want to tell you anything important, and at that point they may not be able to recall their own name. And of course people tell intentionally inaccurate, false or otherwise misleading information to avoid further torture. So torture may work for those who somehow ended up on the enemy side and don't actually care that much one way or another, but not people who are likely to have valuable information. Even the Nazis knew that and instead tried to convict the interrogated they are civilized, well meaning people.