No, being silent does not necessarily indicate that someone is a genius. Genius is typically associated with exceptional intelligence, creativity, and problem-solving abilities in a particular field. However, personality traits and behaviors can vary greatly among individuals, including those who are considered geniuses. Some geniuses may indeed be introverted or quiet, preferring to observe and reflect deeply on their thoughts. Others may be more extroverted and expressive, sharing their ideas and engaging in active discussions. It's important to remember that intelligence and personality are separate aspects of an individual, and there is no universal pattern of behavior that applies to all geniuses.