1) Body language can provide additional context and meaning beyond what is said verbally. Gestures should be observed together, not in isolation, to understand the full non-verbal message.
2) When intuition suggests someone is being insincere, even if they sound logical, it may be because of an ability to subconsciously read body language cues that reveal the true message.
3) Some basic gestures like smiling and nodding are universal and inherent, though children exaggerate them more obviously than adults, who refine the gestures over time.