Intelligence is usually seen as the ability to think and learn, but in a rapidly changing world, there's another set of cognitive skills that might matter more: the ability to rethink and unlearn. In recent months, the pandemic has forced us all to reevaluate our assumptions about health and safety and multiple acts of police brutality have challenged most of us to reconsider our responsibility for fighting racism. If knowledge is power, knowing what we don't know is wisdom.