nope, you cant do that either. but you can have a 'feeling'. now you may not be able to explain logically WHY you have a feeling, but you can either go - ahhh sweet, or that's a bit off (ok, im sure you can think lots of other things too, but trying to keep it simple so i dont confuse myself!!)
You are picking up non-verbal clues.
2 daddies horseplaying with 2 daughters
body language of one is comfortable, easy, relaxed. body language of other is tense - especially from daughter.
you may not be able to point and say
the position of her arm crossed over her chest indicates that she is trying to protect herself
or
their palms open, facing one another, indicates a close relationship and openness
but on a subconscious level you will pick up all these non-verbal clues and you will react to them, like i say with ahhh, or
I kow i have been too 'black and white' but i hope you know what i am getting at.
if you feel uneasy about what you see it may be that you have seen more than you are able to consciously identify.