My expertise in knowing someone is by looking at them for the first time and my mind will determine whether I like him/her or not. If not, there's definately something's wrong with them. That's how I judge people.
Overall bio about the person? Who knows? It takes years to actually know a person so well and better than they ever notice about themselves. Either about their attitude or the way they think about things. Or maybe even to whom their hearts truly belong. We'll never know.
People change, and it takes special skills to actually nailed one correct answer in guessing how is the person's attitude or how their driving skills are.
Psychiatrist for example is the only person who is educated to know about the person's ways of living. They even took Diploma, Degree, Master and even PhD just to nailed 100% about us. They can know what moods we're in based on our awkward movement or our reaction that can lead to another topics and they can manipulate our mind in telling and yelling what's inside. Letting it all out. But the sad part is, it's fucking expensive and I rather die living in pain than hiring one.
But other than that, who knows?
Lets say one day you went out with your friend who invited a bunch of his/her friends and you guys gather along. What's your reaction if this one highlighted person speaks up about you that is insanely true? Do you dare argue or even talk back? Do you even dare to look at his/her's eyes? Or do you just sit around and said "you lucky bastard for nailing that one".
What if out of the blue, he/she talks about random stuff and suddenly pointed at you as if the things that they're discussing somehow related to you. And... what if its true? What if it's the thing in your heart that you never realize before. As soon as that person speaks up about it and you went silent. What'll you do? Is he one lucky bastard again? No. There's nothing there but silence. Not physically, but mentally you went silent.
One in a million people can actually know who you are by just stare at you. " eyes can't fool me when your lips are " he said. I went full silent as he said something unexpected about me during that massive random conversation. I'm not saying its true. I'm afraid it might be.
But hey.. who knows right?
