[Kostchei]

Depends on your life experiences and working environment. If you have worked in prisons and places with a lot of physical violence you can (some don't) acquire a distinct and accurate sense for emotion and threat, based on sound and body language. The actual words don't matter so much, but the interaction of tone, distance, stance etc, they tell you a huge amount. People can be saying "no" and be just asking a question or pleading their case, and they can be saying "yes" and mean "i want to kill you". I used to follow the tone, and when it was going to end badly, make sure I was standing behind the person who was about to start violence (being responsible for physical security in that environment), just as it was about to kick off... Pretty grim work. But yes, you can use your intelligence to learn that stuff. Don't need to be a puppy.

[darkerside]

Yeah, I think we spend so much of our childhoods, if they are healthy, learning to disregard those signals. Authority figure yelling but will not hurt us. Trust.

We rational humans overthink our first instinct and even learn to ignore it. And it helps us function in traditional society.