The signs of high intelligence in a person are not limited to high scores on an IQ test. They reflect a combination of cognitive, emotional and social skills. Here are the main signs:
1. Critical and logical thinking:
Objective analysis: Ability to evaluate information impartially, identify bias and avoid errors in reasoning.
Problem solving: Ability to break down complex issues, explore solutions creatively, and adapt strategies when faced with obstacles.
2. Curiosity and thirst for knowledge:
Lifelong learning: Strong interest in self-directed learning, intellectual challenges and varied subject areas.
Deep questioning: Asking existential or conceptual questions (‘Why? How?’) and seeking structured answers.
3. Emotional intelligence (EI):
Self-awareness: Knowledge of one’s emotions, strengths and limits, and balanced management of reactions.
Empathy: The ability to understand the emotions of others and respond appropriately.
Stress management: Knowing how to remain calm in difficult situations without becoming overwhelmed.
4. Adaptability and cognitive flexibility:
Rapid learning: Ability to adapt to new contexts or to modify one’s opinions on the basis of evidence.
Systems thinking: Understanding the relationships between the elements of a global system (e.g. social and environmental impacts).
5. Creativity and innovation:
Divergent thinking: Generating original ideas by connecting apparently disjoint concepts.
**Problem solving using ‘outside the box’ solutions.
6. Effective communication:
Clarity and precision: Explaining complex concepts in an accessible way.
Active listening: Understand what is implied and respond appropriately.
7. Working memory and organisation:
Selective retention: Memorising the essentials while avoiding excessive amounts of useless information.
Managing complexity: Processing multiform data (data, emotions, abstractions) without dispersion.
8. Self-reflection and metacognition:
Error analysis: Identifying mistakes and learning from them rather than being paralysed by them.
Continuous improvement: Setting goals for personal and intellectual growth.
9. Orientation towards deliberate action:
Intellectual patience: Prioritising the quality of decisions rather than speed (capacity for delayed gratification).
Informed risk-taking: Knowing how to calculate probabilities before acting, without excessive hesitation.
10. Open-mindedness and humility:
Acknowledging limits: Admitting not knowing and seeking contradictory advice.
Intercultural curiosity: Interest in different perspectives and empathy for other experiences.
Note:
Intelligence is plural (as Howard Gardner points out with his multiple intelligences). It can be expressed through artistic, social, kinaesthetic and other skills. A ‘great’ intelligence is not a hierarchy, but a diversity of potentialities to be cultivated.

