Person, Human, Thumbs Up, Arm, Hand, Non-verbal communication, argumentation, at the same time, body language, communication channels, denial, feelings, forms, gestures, hands, handshake, hide, intonation, kinesics, negative, palms, people, posture, protection, rejection, science, self-expression, sign language, spontaneously, support, together, trust, unconsciously, category, sort, kind, acknowledgment, faith, sensitivity, argument, hand, prosody, speech, skin, palm, skill, debate, gesture