There is a significant disconnect between our internal emotional state, our physical motor patterns, and the language we use to describe our feelings. These three streams of behavior only correlate at about 0.2, meaning what someone says they feel often doesn't align with their body language.

There are no universal cues for lying. Instead of assuming a gesture like crossed arms means someone is being deceptive, view it as a change in their state. This change is a signal to become curious and ask clarifying questions.

AIs struggle with mentalizing and empathy because they lack embodiment. Citing a study where Botox users became worse at reading facial expressions, Sanderson suggests our ability to understand others' emotions is partly based on subconsciously mimicking them. AIs, being disembodied, cannot perform this mimicry, leading to a fundamental deficit in their 'theory of mind.'

Evolution designed emotions to help you move forward and make decisions, not to accurately perceive the world. Relying on them for truth leads to poor long-term outcomes. Your feelings don't have inherent "validity"; they are biological reactions.

Your internal emotional state is transmitted to others, even when you try to hide it. Behavioral investigator Vanessa Van Edwards found that subtle micro-expressions induce the same feelings in others, causing them to form a negative or positive opinion about you within the first few seconds of an interaction.

We consistently overestimate our ability to detect lies by reading body language. Empirical research shows our accuracy is only slightly better than a coin flip (around 54%), yet the belief in this skill persists as a strong cognitive bias.

Beyond the classic six emotions, research now identifies about 20 distinct, universally recognized facial expressions like awe and compassion. AI analysis of millions of videos across 144 cultures shows a 75% overlap, revealing a significant hardwired component to our emotional displays.

Popular heat maps illustrating where emotions are felt in the body do not show actual physiological changes. They represent where people *think* they would feel an emotion when prompted by a word (e.g., "sadness"). The real bodily signatures of different emotions have not been scientifically mapped.

A key facial indicator of potential volatility is an incongruous expression. Specifically, when someone holds the 'fear' expression in their upper face (eyelids pulled back) while the lower face shows joy or arousal (a smile), it creates a deeply unsettling effect. This mismatch is a significant red flag.