Can you sense when a person is bad?

I mean adult or child. They could act like the nicest person in the world, smile at all the right times and meet your eyes. But what are the common tells that someone actually isn’t a good person? And how often are you right about when it comes to judging a person’s character?

I’m often right when judging a person’s character.
I frequently judge wrongly.
Select gender and age to cast your vote:
Can you sense when a person is bad?
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