Matching laughter is a powerful tool for connecting with others. People who match the energy and mood of someone's laughter signal a desire to connect and demonstrate high emotional intelligence. Failure to match laughter can make the other person feel pushed away, ostracized, or condescended. Mismatched laughter signals dominance or rejection. It is instinctual for people to differentiate genuine laughter from fake laughter, as evidenced by studies showing high accuracy in distinguishing between the two.