They cannot say because they were a threat. Unless they had intel on who these men were? But by the looks of it I can’t imagine any person who is a militant would be walking like these men.
This shit is dumb as fuck. You start off with a 50/50 chance of guessing right to begin with. Then just ask do you like sports? There. You get to 98% acuracy without any fancy chips and circuit boards
How do you know? (Serious)