Raw smarts or wisdom?Scientists who study aging stress that there is a huge degree of variability in cognitive functioning among individuals. Some teenagers are perpetually forgetful, while some in their 50s are Jeopardy! champions. However, one factor is consistent: The cognitive skills that tend to surface later in life bring increased insights and an enhanced level of discernment. In a word, what emerges is wisdom. Wisdom manifests in many ways: Seeing the big picture. Exercising emotional...