You came across thousands/millions of people in your 192,720 hours of your life you have lived. You have dealt shit. You notice movements, signs, reactions, expressions, tones, ... consciously or subconsciously. Also, educated, you know alot of logic and science. Stored all in the memory, so, your brain helps i guess. Plus, you also started lying from the age of 6 so you the exparrrt. Experience counts my brother??
Oh jee ef off? You too could have simply ignored the answer but see you asked in thread na! It's not simple. It's illogical and becoming so so boring noww. If one can't eat a meal for life and that too sent from heaven, then think about your que? Your most favourite dish? That's the question? For the rest of your life and blah blah blah huh?