That's what I thought but it's not vague!
I thought it was people highly skilled in body language and alike that would suggest random nonsense at first and then home in when they noticed the appropriate action. I thought that you would go away only remembering the points they got right and...
My wife has this ability - at first I was extremely sceptical and actually quite a dick to her about it making out she was pathetic and lacked intelligence to believe such crap from con artists who preyed on the vulnerable ! I would say that only science has proved anything etc.... However I now...