What are properties of wicked problems?

Contributor(s): Dr Guru Madhavan | Our world is filled with pernicious problems. How, for example, did novice pilots learn to fly without taking to the air and risking their lives? How should cities process mountains of waste without polluting the environment? Challenges that tangle personal, public, and planetary aspects―often occurring in health care, infrastructure, business, and policy―are known as wicked problems, and they are not going away anytime soon.